Can confirm 1.17.1 Pre-Release 1; I was wondering why my farmland kept breaking during bonemeal frenzies.
Can vouch for it still occurring in 1.11.2; I have had this happen to me twice when trying to lead a llama caravan home and have had to tie one to a fence and make bridges/paths for everyone to follow on.
Same with me though it's not flat.. it's coming up error that it won't load my main world and iv had it a couple years now.. no idea what's going on with the game