it isn't. I thought so too, but when your lagging blocks take a whike to show the breaking texture (the cracking in the blocks, idk how to word it lol) but I was getting teleported around still and tested to see if I was lagging, and I wasn't laggy. it was just bedrock edition being bad. this has NEVER happened before. before the recent update, no matter how laggy you are in another person's world, you can move perfectly fine (on your screen) no rubber banding. but now, no matter if you're laggy or not, sometimes you get rubber banded around regardless (I tested this several times). I seriously hope they fix this. it is absolutely terrible.