I've got an iPhone Xs Max (how old? no clue) Despite the camera bump if I have it on a flat surface playing audio it will scoot off and take a dive. (I ended u

I've got an iPhone Xs Max (how old? no clue) Despite the camera bump if I have it on a flat surface playing audio it will scoot off and take a dive. (I ended up putting a case on it for that reason alone)