Currently using UE5.3.2, but this was observed in 5.2 and 5.3.1.
Some drop down menus such as from the buttons “Selection Mode” or in a component, “Add” close back again immediately after being pressed, rendering such functionalities therefore UE5 unusable in practice. Strangely enough, other drop down menus work fine. No crashes.
Running on Pop_OS! 22.04, KDE Plasma (x11)*, AMD Radeon RX 6600. Lutris 0.5.14.
*I also have Gnome installed, not sure if it’s running via KDE or Gnome