"Show Master Compatibility" disabled on mouseover

Glyphs
#1

“Show Master Compatibility” is being disabled when hovering over points/components or when zooming in/out of glyphs (Screen recording).

Restarting Glyphs, uninstalling plugins, and restarting my computer isn’t helping.

Glyphs 3.0.5 (3125)
macOS Monterey Version 12.3.1 (21E258)
Apple M1 Max

#2

Can you send me that .glyphs file?

#3

I’ll email you.

#4

The problem is caused by your instance setup. You have a lot instances that have all masters in the “Disabled Masters” parameter. I fixed the problem. But you should fix your instances.