As said on Discord #dev channel yesterday, PR #2113 introduces a lot of blocking issues.

These are the results of the tests done by me, @AndreMiras and @opacam :

• sdl2==2.0.10 have issues that have been solved by the SDL2 team, so it needs to be bumped to 2.0.12.

• sdl2==2.0.12 works but create freezes during runtime.

• These freezes are definitely related to the new SDL_LockMutex / SDL_UnlockMutex mechanism they added for concurrency issues.

• Commenting SDL_LockMutex on Touch related events fixes the freeze issue for non-fullscreen apps.

• On fullscreen apps, the patch it's also needed on Resize, .. etc events.

I'm providing an attached patch that fixes the issues on top of 2.0.12, btw seems not a good idea to do that, so it needs some more investigation:

disable_mutex.txt