In Glyphs 3.0.4 (3094), exporting a font to OTF and submitting to MyFonts via the Monotype validator results in a “vertical metrics will cut off font in Windows” error. This would happen no matter what I set the WinAscent and WinDescent parameters to, even something silly like 2000.
Exporting from Glyphs 3.0.3 (3091) passed the validator just fine with no further edits.
The font in question had both Arabic and Latin glyphs, but as an experiment, I made a copy and cut out all the Arabic glyphs and the error still persisted.
I’m on the newest macOS 12.0 beta if that matters.
Just a heads up. Thanks!