Can't select files or folders in dialog box

Every time I want to save or open a file from any program (Chrome, Keynote, Numbers, Safari,...) on my 2021 MBP, when the dialog box opens I can't click on any of the folders or files, nor can I click on the filename for changing it. I can only press Tab, the arrow keys and Enter on my keyboard to move around, although this doesn't work correctly. What kind of bug am I having? Update: After restarting, the problem dissappeared, but after a few days sleeping (and waking) the computer, the problem has returned. I run Chrome, Anaconda Navigator, YouTube (app), YT Music (app), Keynote, Notes and agenda as apps. The problem occurs in Chrome, Keynote when trying to open or save a file. Update 2: I attach a screenshot. I cannot click on any of the (activated) buttons or folders etc. Cmd+1/2/3 still works (as using Tab and Esc).