Style Linking + Glyphs Projects

Style linking with Glyphs Projects seem to be behaving weirdly.
It gets confused with the .glyphs file instance parameter and the results are wild.
Also in the glyphsproject window > If I type regular in a box for bold for example, the box changes to regular in all other instances. Thus I can’t style link Light + Light Italic for example (even though that might be bad practice).

Which version of the app?

Cutting Edge Erich.

I found out I had some weightClass issues, and the glyphsproject settings might have conflicted with the regular instance parameters as well.

I tried to reproduce what you did but I don’t understand what you meant with this:

Can you give a step-by-step description of recreating the problem, please?