I'm not sure what their answer to that will be, but I personally have experienced it since 1.13 or 1.14. In my case, however, it's much MUCH more minor, usually just on the corner of the screen, and always at the edge of chunks, so I assume it has something to do with culling.
It does seem a bit inconsistent though, for me at least.
Why is this labeled as crash?
I realise I'm late to the party, having just seen that there's a new snapshot, but I back this.
Note: You have to be sneaking to reproduce this bug (just for those people who don't know all the 1.14 features)
Can confirm this is the case for 1.16.2, at least. This is without a resource pack, but with the OptiFine mod installed. Will check without after.
EDIT: It also occurs with 1.16.2 and 1.16.3 without OptiFine.