Since there were changes to the mask behaviour in version 3077, some Glyphs are not displayed as before in Glyph View and Font View (left = earlier version, right=version 3078):
The glyphs have a “mark, mark mask, base glyph” structure as mentioned here. The issue seems to be only the display in the Glyphs app. When exporting a otf, the masks are applied correctly.
Hey hey @GeorgSeifert are there news on this issue? To be able to work on the project I installed the stable Glyphs3 version (3058) on a different computer. But it when I try to open the font file Glyphs crashes as soon as I’m in the Font-View window. So now I’m not able to work on the project with both versions