Hi everyone,
I sadly have the same issue and tried to find a workaround via a script, but it seems you can’t switch back to the normal DS4 mode after the extended mode was activated without power cycling the controller.
I encountered it while starting SDL2 supported PC Games from GOG in Big Box with a .bat file to activate the rumble function in those games. When closing the game BigBox cannot be navigated without turning the controller on and off again.
Unrelated to the thread: If anyone is curious and you want to play non-steam PC games with your DS4 controller and want to activate SDL2 extended mode (e.g. for rumble), you can start the game with a .bat-file. The game folder needs to contain SDL2.dll.
@echo off
set SDL_JOYSTICK_HIDAPI=1
set SDL_JOYSTICK_HIDAPI_PS4=1
set SDL_JOYSTICK_HIDAPI_PS4_RUMBLE=1
start "" "GAME.exe"