Minecraft movement bug 3 Bugs

Today and last week (even last year ONLY my plus devices had the second bug) while playing Minecraft I was looking around in game and when using the movement pad and looking around at the same time I just automatically flick to the back in game. 

Second bug: Today Im still experiencing this: When looking around in game on highest and lowest video settings the FPS goes down so much that it tears when looking around

 

Third bug: on iPhone 8 Plus on highest video settings the FPS tears just like the second bug just basically lags hmmmm ·_· otherwise it's because no one reported this before... Also I experienced this on other plus devices that I have.

Also I don't have screenshots only because the bugs can be seen with a screenshot sadly.