It worked fine on my tablet since I got, and then broke. its now fixed and I am using it again. I had to use X for a few weeks and it does seem that Wayland is a lot less mature than X on ARM.

I do use Wayland on my desktop too, and the workaround in the case of Wesnoth was to use XWayland. One of the difficulties is that I have no idea whether the bug is in Wesnoth or KWin so do not know where to report it.

Hmm I reckon some SDL-based software have main loops that assume display txns are synchronous and that assumption can cause all kinds of havoc, so depending on what Wesnoth is doing, you could maybe try `SDL_RENDER_DRIVER=software` and see if it also works around the issue (in which case that would be helpful for the game devs to know).