I am not hundred procent sure if this actions/ reasons are all correct, and I know that they are partwise duplicates but I wanted to sum them up:

• TIME: After a certain amount of time (between 15 and 130 seconds) the game seems to stop rendering actions like: explosions, removing/placing blocks (maybe this is also caused by inactivity?)
• CHUNK: Some chunks just don't render
• HEIGHT: When you fly to high blocks stop render (only with setblock command performed by command blocks) and
• HEIGHT 2: When building to heigh the blocks won't render independet from the time