@Christoph-Hart Hmm... not sure but it might...
The older built I'm using is 20 days old only, and my labels are saveInPreset: disabled in my project anyway, so why would the last build enable it? (so empty their text is a consequence of this I guess)
It looks like the saveInPreset property has been re-enabled by default
The problem is not for new labels, but the actual ones that are already here