A problem with selecting all files (Ctrl+A) in a search

There's a problem when hitting Ctrl+A... all files do get marked, no problem there, but as soon as you right click on one of them, all of the files get deselected and only the one that is currently marked (with the right click) is marked.

Interestingly enough, this only happens when you hit Ctr+A. If you scroll from top to bottom and select all files manually (select first file, hold Shift, select last file), there's no problem, the files stay marked.

I though it might be a bug in the Ubuntu 20.04 repo version, so I decided to ditch the apt version and install the latest release, so currently, I'm using Catfish 4.16.3.