I was making a map on the version before the update, i closed the app to get food and when i finished the game automatically updated to 1.21.0, so i opened the game and went onto my map, i was trying to break some blocks in creative but realised that they wouldnt be destroyed by a one shot, so i closed and reopened the app just to find the same problem, basically when you try break a block it sometimes takes like 2 hits to break it or just doesnt break at all