Don’t use Windows or Linux (desktop) much anymore so not really familiar with electron apps and their window behavior. It does seem odd though. Using Windows 11…
-hidden frame:
Can’t find or use those menu items by clicking anywhere or using hotkeys.
-obsidian frame:
Clicking the Obsidian icon shows the menu but no hotkeys on the menu work for me (sub-menu hotkeys are fine).
-native frame:
Don’t see File/Edit/Insert… along the top at first, but if I hit alt+f, the menu bar then shows, can be clicked, and alt+f, alt+e, alt+i… can be used.
Not really any further along, but said I’d check back in. 