Vocal, freeze and lag

On mobile, when I'm talking with other people while I'm on a game for few minutes, my overlay and the whole discord app is starting to lag and freeze, I can't switch to another server, I can't have access to the vocal when I talk (so I can't mute or demute me) and I can approximately do nothing, even if I try to do something by using the overlay, but nothing I can do nothing. Please fix that.