This has been a bug in the game for as long as I can remember. Happens also when using a Eff 5 pick with Haste 2 on stone type blocks
Never mind. I figured out what it was. It was Optifine causing the massing lag spikes.
Sorry for my delayed responses. After further investigation, I've found the problem is most likely the fault of something in the way I used WE to copy/paste parts of my spawn... Could possibly be related to region protections I had in place. Sorry to waste your time, all.
This issue is not resolved yet. I haven't had a chance to respond until now. As I stated before, this is the map I use for my server. The .zip file would be too large to upload, and I really don't want anyone else to have a copy of it. Instead, can you list possible reasons this might happen? Or, is there a smaller bit of data I can upload to you that would not compromise the identity and contents of the map? If not, I guess I just copy/paste my spawn back in the same area, but I'd rather not have to do that.
it duplicated the anvil and then they disappeared
yes I was
This issue is legit! I have noticed this as well it needs to be addressed and looked into.
Its not correct version. 1.12.0