HUD and entities disappearing in specific worlds

This bug made me quit the game since May. I reported this bug with the tag MCPE-76139 but you guys didnt listened to me and deleted it.

 

I have a survival world that Ive been playing since start of the year. In april, my world started bugging, and this bug led to disappearing of HUD and entities a few seconds after I load my survival world. Also chunks blinks weird lines and sometimes blocks become invisible for 1 second. All the other worlds have not any problem kinda like this. Only my survival world. 

 

Please help me, I have a low-end phone but I really wanna play this game for at least 2 years.

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My device is LG G3 Stylus 8GB Duo.