I very recently upgraded to Ubuntu 25.10 and am confident all software is up to date.
For a while I thought there was a flaw in the system with drop down menus, as I would click on them and nothing would happen. Then I noticed that they were dropping at the upper left corner of my laptop’s screen.
This might make sense on a hand held device, but, to me at least, not on a larger screen.
At first I wondered if this might be by design, but now I see that some drop downs function as I would expect.