JabRef 5.2--2020-10-07--4b1b7b4
Linux 4.9.0-13-amd64 amd64
Java 15

• Mandatory: I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

The View menu lists the following shortcuts (among others):

• 'Alt+3' for Groups interface
• 'Alt+0' for OpenOffice/Libreoffice
• 'Alt+4' for Web search

None of them are working.
I am using the default key bindings (and, to make sure, I reset them in the Key binding window).

So, the issue is more general than described in #6646