VISUAL GLITCHES and SETTINGS CRASG

Anytime I get on the mobile bedrock Minecraft, I see visual gltiches on the bottom left, it begins flashing at high speeds, and then when I enter a workd, the hotbar disappears unless I move around but moving around doesn't alway fix, and then most of the icons in the inventory disappear unless I tap somewhere on the inventory, and the background of cooridnates is also gone when it's supposed to be there. The doors also glitch out and flash in and out, and my hand does it too.

Whenever I press Settings in the pause menu, thengame freezes. All of this started this year from what I remember. PLEASE FIX THESE THINGS. I have video evidence of these occurences. Seriously guys I want to play Minecraft anywhere I go with my phone. That's the goal, right? Pocket Edition? PLEASE GUYS. THIS IS VERY BAD.