have you updated game yet or not yet?
I have updated the engine to a more recent build, and will do so about every 2 releases, unfortunately it is not up to me what the engine devs do and do not fix. I can't guarantee if or when they address certain mobile problems
Hoe come I can play the web version and not the mobile version
Likely because your browser doesn't have the same bug the main godot engine has, and it handles the shader rendering when playing on web