So I click on an object, like a cube or sphere, and it automatically deselect itself either immediately or after a small while. It didn’t happen with any other version of Blender I used. Only Blender 5.2LTS.
Here’s a small vid to show you all what I mean:
Hmm, it doesn’t happen on my install of 5.2LTS.
Do you have any addons running?
Like a pure dumbass I didn’t think to turn off all the addons and turn them back on.
Now I did, and it was indeed an addon. For posterity, it was this one: https://extensions.blender.org/add-ons/sculpt-subtools/?utm_source=blender-5.2.0-lts
Turning it off fixed the problem.