Both masters showing in one layer - previously each had their own

Glyphs
1

A file that I created and haven’t edited in at least a year now opens incorrectly in Glyphs (986). All layers are missing, and all instances are showing in the same non-layer. Switching masters does nothing.

I’m wondering if this is a known defect or I’m special

Happy to provide the file in question

2

Could you send me the .glyphs file? I’ll have a look. Hopefully you have an old version?

3

File sent – thanks

4

(We solved that a while ago. Just for reference)

You accidentally activated the “Edit all Layers” tool. Click and hold the leftmost icon and select the the single arrow.