The tabs opened in Glyphs 3 are no longer sharing same widths and I found that if I open more than like 3-4 tabs, the last one (or few) of them would disappear out of the window thus I can’t select them. The only way of selecting/closing them is to open a new tab from the font panel that brings me to the right-most tab and work from there.
I found it consistently existing on every file or new files in Glyphs 3
I’m using the latest stable release.