<![CDATA[HISE Sampler VSTs Crash? Across multiple brands (FL Win)]]>Hey there! As you know we released Fraction a few months ago.

https://eraformaudio.com/

We are encountering a lot of customer feedback that the VST crashes inside FL studio.

The root seems to be very simple - double clicking the VST in FL(win) = crash.

We tested a couple VST Sampler from other brands, and they seem to have the same issue:

CUBE by Lunacy Audio
Fraction by Prototype Audio
MNDALA 2 by mntra-instruments

prob more HISE+webview products?

So we think its HISE related - any help is apprechiated, you may be aware of this issue @Christoph-Hart but would love to get your take/debug suggestions on this.

some customer feedback:
409dcc99-86d9-4ddc-a13a-4c186f458070-image.png

9237a212-ca75-49b4-ba04-3aa6f1a8c568-image.png

]]>https://forum.hise.audio/topic/14376/hise-sampler-vsts-crash-across-multiple-brands-fl-winRSS for NodeThu, 16 Apr 2026 11:57:53 GMTMon, 09 Feb 2026 14:41:44 GMT60<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 03 Mar 2026 10:07:31 GMT]]>@Christoph-Hart Thanks for taking a look! ๐Ÿ™

Any news on this? I plan to push some other webview feature updates end of March.

]]>https://forum.hise.audio/post/118445https://forum.hise.audio/post/118445Tue, 03 Mar 2026 10:07:31 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 24 Feb 2026 18:19:04 GMT]]>@David-Healey I don't think it's a regression, if it happens to CUBE then it has always happened - I'm fairly confident they are not using the latest HISE version for their current version.

]]>https://forum.hise.audio/post/118318https://forum.hise.audio/post/118318Tue, 24 Feb 2026 18:19:04 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 24 Feb 2026 17:24:50 GMT]]>@Christoph-Hart It's happening in recent versions of Mndala too, so I suspect there was a regression at some point. Maybe someone can try finding an older commit where it doesn't happen.

]]>https://forum.hise.audio/post/118315https://forum.hise.audio/post/118315Tue, 24 Feb 2026 17:24:50 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 24 Feb 2026 16:05:29 GMT]]>@Christoph-Hart Yes, as of a week ago it is still happening.

]]>https://forum.hise.audio/post/118314https://forum.hise.audio/post/118314Tue, 24 Feb 2026 16:05:29 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 24 Feb 2026 16:03:05 GMT]]>@HISEnberg ah ok and itโ€˜s still happening on the current dev branch? The cube plugin is quite old so it might be fixed in the meantime.

]]>https://forum.hise.audio/post/118313https://forum.hise.audio/post/118313Tue, 24 Feb 2026 16:03:05 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 24 Feb 2026 13:51:20 GMT]]>@Christoph-Hart This already happens with any of the examples from the hise_tutorial actually. Just export one of them on a Windows machine, load it in FL Studio, and click on it a bunch of times. You'll receive the same crash report (why users click on it a bunch of times is beyond me, but this is FL Studio we are talking about).

]]>https://forum.hise.audio/post/118312https://forum.hise.audio/post/118312Tue, 24 Feb 2026 13:51:20 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 24 Feb 2026 13:38:58 GMT]]>@Straticah Can you try to make a minimal example that crashes FL Studio? You can start with the webview examples in the hise_tutorial.

Ripping out the webview for your preset browser would be the wrong move, let's see if we can fix that.

]]>https://forum.hise.audio/post/118311https://forum.hise.audio/post/118311Tue, 24 Feb 2026 13:38:58 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 24 Feb 2026 13:33:42 GMT]]>@Straticah It will require some careful edits to the HISE source code to properly fix. I haven't had time to investigate it personally. You could try deferring any callbacks to your Webview before it is launched. If you use Content.callAfterDelay(int milliSeconds, var function, var thisObject), it may give the host time to respond to multiple instances of the webview loading simultaneously. If this does work it will only act as a sort of bandaid to the root issue.

]]>https://forum.hise.audio/post/118310https://forum.hise.audio/post/118310Tue, 24 Feb 2026 13:33:42 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Tue, 24 Feb 2026 09:59:15 GMT]]>@HISEnberg @Christoph-Hart So the only solution right now is to remove webview from my VST?

I mean its possible to rebuild the browser in HISE, but want to check before i do.

There is more than 1000 people using the VST right now - getting a fix/workaround from my side is kind of expected from me.

c7ee88b6-990e-4d62-8979-2b3bb355cc02-image.png

]]>https://forum.hise.audio/post/118299https://forum.hise.audio/post/118299Tue, 24 Feb 2026 09:59:15 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 16 Feb 2026 16:47:28 GMT]]>@Christoph-Hart a good candidate for the your new Claude/Ralph system? This one is a bit over my head unfortunatley... Maybe just confirming the Webview is always running on the right thread and it is properly addressing race conditions in FL? Just a reminder the issue sounds very similar to this one: https://forum.juce.com/t/br-webview-freezes-daw/64917

]]>https://forum.hise.audio/post/117953https://forum.hise.audio/post/117953Mon, 16 Feb 2026 16:47:28 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 16 Feb 2026 16:46:33 GMT]]>@David-Healey thank you :)

If anybody gets some insight on this - it will probably help a dozen HISE + WV plugins.

]]>https://forum.hise.audio/post/117952https://forum.hise.audio/post/117952Mon, 16 Feb 2026 16:46:33 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 16 Feb 2026 16:42:47 GMT]]>@Straticah I'll let them know

]]>https://forum.hise.audio/post/117951https://forum.hise.audio/post/117951Mon, 16 Feb 2026 16:42:47 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 16 Feb 2026 16:42:15 GMT]]>@David-Healey it does yes:

a7901ee2-ebf0-4c4c-8448-cd45518ab43f-image.png

]]>https://forum.hise.audio/post/117949https://forum.hise.audio/post/117949Mon, 16 Feb 2026 16:42:15 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 16 Feb 2026 16:24:43 GMT]]>@Straticah I think Mndala is also using webview, does that crash for you?

]]>https://forum.hise.audio/post/117946https://forum.hise.audio/post/117946Mon, 16 Feb 2026 16:24:43 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 16 Feb 2026 16:11:49 GMT]]>@HISEnberg Guys you were right the webview is the thing that crashes Lunacy audio Cube and also my plugin...

Pluginval shows no error all working fine there.

In order to NOT crash i had to remove (not only hide+deactivate) the webview panel + its code.

Seems like something thats not fixible from my side - and that a more "famous" vst has this issue gives me less hope that i will be able to solve this ๐Ÿซ 

]]>https://forum.hise.audio/post/117943https://forum.hise.audio/post/117943Mon, 16 Feb 2026 16:11:49 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:32:29 GMT]]>@Straticah Yea I suspect this is your culprit:

https://forum.juce.com/t/br-webview-freezes-daw/64917

Do you have enablePersistence set to true?

Do you get any useful information when running your plugin through pluginval?

]]>https://forum.hise.audio/post/117617https://forum.hise.audio/post/117617Mon, 09 Feb 2026 15:32:29 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:24:42 GMT]]>@Straticah said in HISE Sampler VSTs Crash? Across multiple brands.:

A build without bebview will be worth a test!

100%

]]>https://forum.hise.audio/post/117614https://forum.hise.audio/post/117614Mon, 09 Feb 2026 15:24:42 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:22:50 GMT]]>@bendurso It is loading slow indeed but not much slower than other VSTs.

The webview works like a charm so far (which is surprising) but it could be the issue.

Might have been coincidence theat the only HISE "other brand" vst i had installed was with a webview aswell? :D

Will know more once i bypass webview from my build...

]]>https://forum.hise.audio/post/117613https://forum.hise.audio/post/117613Mon, 09 Feb 2026 15:22:50 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:19:11 GMT]]>@Straticah Oh webview on Windows could be a trigger. I had to remove the webview on windows because the plugin was loading so slowly.

I made a post a time ago about it: https://forum.hise.audio/topic/13464/webview-doesn-t-work-on-compiled-plugin-in-windows/18

]]>https://forum.hise.audio/post/117612https://forum.hise.audio/post/117612Mon, 09 Feb 2026 15:19:11 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:17:50 GMT]]>@HISEnberg

We are using a Webview same goes for Cube - correct. I was assuming the data refers to expansions because FX never produce this issue.

A build without bebview will be worth a test!

]]>https://forum.hise.audio/post/117610https://forum.hise.audio/post/117610Mon, 09 Feb 2026 15:17:50 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:17:43 GMT]]>is the "make bridged" enabled ?

I havent encountered any crashes in FL Studio(Windows) so far with my plugins but i found if i double click the open button, the display window will glitch when the plugin is loaded as bridged.

]]>https://forum.hise.audio/post/117609https://forum.hise.audio/post/117609Mon, 09 Feb 2026 15:17:43 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:14:49 GMT]]>@Straticah Not happening for me on FL on Windows either (at least for my plugins). Are you using a lot of image files? It sounds like FL Studio crapping out trying to load resources from disk. This may be a DAW related issue rather than a HISE one (I know you say it happens in other DAWs however)?

Also are you using a Webview for this plugin? I imagine that may be the commonalitybetween Fraction and CUBE?

]]>https://forum.hise.audio/post/117607https://forum.hise.audio/post/117607Mon, 09 Feb 2026 15:14:49 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:14:46 GMT]]>Yes this issue is on FL-WIN only it seems - like always :)

]]>https://forum.hise.audio/post/117606https://forum.hise.audio/post/117606Mon, 09 Feb 2026 15:14:46 GMT<![CDATA[Reply to HISE Sampler VSTs Crash? Across multiple brands (FL Win) on Mon, 09 Feb 2026 15:12:37 GMT]]>@Straticah I can't also reproduce it on mac with my plugins. Not sure about windows, I don't have FL Studio installed on my windows computer.

]]>https://forum.hise.audio/post/117605https://forum.hise.audio/post/117605Mon, 09 Feb 2026 15:12:37 GMT