When a falling_block entity has the NoGravity tag, and you /execute them to teleport in any direction, they will sometimes take nearly half a second before actually moving. They are also inconsistent in the way they do this. Sometimes they teleport almost instantly, other times you sit there and watch it do nothing for a few hundred milliseconds until it finally moves that one block I want it to move. It's extremely annoying because I am building something right now that requires them to move instantly, and it can't happen because the NoGravity falling_blocks are laggy.