stefan

Can confirm this is still very much a problem in latest snapshot 21w17a and every version below
I've bred up tens of bees already and all of them get lost somewhere over an ocean to the northwest of my map never to return home again.
Makes keeping bee's a complete waste of time and is ruining build ideas that involve bees.

Issue still remains and is the absolute nightmare for any creative server. People are bringing in items with NBT tags that are so big they make other players crash and get autokicked, resulting in them being kicked again every time they log in, so basically a way to ban any player you want off a server without having op permissions.
People can bring in highly enchanted tools that can even kill players who are in creative mode.
People can bring in fireworks that last up to minutes, crashing anyone with minimal pc's.

Please mojang, just add a gamerule to the game that is /gamerule loadsavedtoolbars true/false, it will make creative server owners finally able to not have to fear for the well-being of their server every day.

Update: Blowing it up seemed to have reset the block. weird since no other way to update the block has fixed it. not even tall doors or portals.

i've uploaded some pictures wich show the air can't be pushed by pistons, also water flows arround it and redstone doesn't pass through

no, this world was made in 1.13. also there are 0 addons to the world, plain vanilla

there aren't barrier blocks. also these unbreakable blocks seem to only form in air blocks and caveair blocks. they aren't formed by players. we seem to have more issues with formations on our world. our woodland had been cut in half and there are a lot of trees that get cut off on chunk borders.