Playing on a multiplayer server I discovered a bug with pets. Any player on the server is able to change whether my dog is currently sitting, or standing. This was not a problem on 1.15, but has arisen upon updating the server to 1.15.1. This bug only applies to dogs. If the player that is changing the status of the dog is the owner, the players arm will swing like normal. However, if the player changing the status isn't the owner, the arm will not swing.