I connect the Xbox One S controller to my Oppo F1, Start up Minecraft Pocket Edition. Navigate menu with the controller. Load a world. Move around works fine.

But when I press the left and right trigger the controls bug out. It goes from looking straight to going straight diagonally up into the air pressing the triggers just makes it go the other way and its just back and forth. I have attached a video of it.

At the end where its just looking up at the sky I'm not pressing anything. That is just the controller/game doing that. I have tried remapping the controls as well but it will not let me remap the triggers. Its as tho the game doesn't think they are triggers. I can't work out 100% if its the controller tho. As it works fine on the console. It going other directions is me pressing the triggers.

The phone I'm using is Oppo F1