Bug: 1Password does not respect language set for it in System Preferences => Language & Region

I'm running macOS in Danish but would like to run 1Password in English. To do this I tried adding 1Password to the list in System Preferences => Language & Region and set its language to English. This works on the first launch. However when I quit 1Password completely via the menu bar icon (or log out and in again) then on next launch 1Password has reset itself back to the System Default language (Danish in my case - I'm guessing it is the same with other languages).

I've also tried setting 1Password to English via the terminal with "defaults write com.agilebits.onepassword7 AppleLanguages '(en-US)'". This doesn't work either. The value seems to be deleted on the next launch of 1Password.

1Password Version: 7.7
Extension Version: 7.7
OS Version: 11.0.1
Sync Type: 1Password.com