it's a glitch caused by the unikey settings. normally keyboards have their keys made in english alphabet, the qwerty one, so in order for foreigners to use, we need another app to change the keybinds into what we want, unikey is somewhat a universal app vietnamese use for that. my guess is that the keybind of D( unikey on its d-đ) interferes with your codes, it can't recognize the letter đ in our alphabet so it redirect the keybind to pause the game.