I will include SS in the next build then as well as a newlib build that may bring up GR windows as before due to hacks necessary in the threading.
As for the minimize issue. I said before that I can reproduce it. There is a lot of code in mednafen. Ideally, I would create a minimal reproducible.
All I can say is that Mednafen does this:
window = SDL_CreateWindow("Mednafen", winpos_x, winpos_y, 64, 64, try_flags[i]);
where, for the relevant i:
try_flags[i] = SDL_WINDOW_HIDDEN | SDL_WINDOW_OPENGL
If someone can try that and see what happens. Otherwise, I "may" get around to it eventually.