Strange letters in Glyphs3 Menu

Hmm, two strange letters for shortcuts in the Menu “Glyph > Update Metrics” and “Update Metrics for masters”.

Glyphs 3.0.3 (3086) and Big Sur 11.4.
macOS is using German language and “Disable Localization” is set in Glyphs3.
When I turn on localization (German Text) shortcuts working and no strange letters to see.
In Glyphs under preferences, no shortcuts are set.

glyphsmenu german

The shortcuts are stored by menu item title, which is why the keyboard shortcut does not transfer from one language setting to another. If you want to use Glyphs in English, set the shortcuts again in the preferences.