Yeah the problem with that is that I changed the way how icon path data is handled (I tried to reduce the binary size of HISE by putting all path data into one translation unit), however I need to update all places where I use the icons and if I forgot something, it will be an empty icon like here.
I get an assertion if I try to render a path like that in my debug builds, however it appears that I haven't opened that particular window for quite some time :)