Crashes every few mins.

Played the word for a couple of hours; was fine.

Now, just crashes out within seconds of loading - sometimes within 10 seconds (doing nothing), sometimes after about 5 mins (then when opening a chest, or accessing another inventory).

Seems to happen within a certain area - most "stuff" is near 0,0 and if I go 200 blocks away, I can play. But if I return to that area it soon crashes.

Example attached.

Relates to MC-160492 (but I'm a bit salty about the way that's been dealt with.

[actually, will attach link after]