JabRef 5.0-beta.532--2020-03-04--8111707
Linux 4.9.0-12-amd64 amd64
Java 13.0.2

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

While resizing the entry editor (to give more room for the entry table), a second entry table appeared in the entry editor.
To show you what I mean:

• The display went back to normal after switching between tabs (i.e. databases).
• I could not find a way to make it reproducible.
• Log file (Help > View event log) is empty.