Hello again, sorry for reporting so many bugs on a row, I hope this is the last one (but I love ECWolf too much to ignore them).
When toggling FULLSCREEN, VSYNC and RESOLUTION on the menu (individually or one after the other) the game sometimes freezes, segfaults, etc. Maybe something to do with SDL2 video-reinitialization between changes? I suspect anything similar.
It happens on different SDL2 backends: X11/GLES and also KMSDRM/GLES.