A lot of lag on realms and server in solo it’s pretty small but on realms it’s really noticeable and if your wifi is kinda slow you crash like each 2 minutes which makes it impossible to play and that’s without talking of the freezes that happens when chunks with a lot of mobs are loaded you also get randomly disconnected sometimes after the crashes occur 

-how to reproduce (go in a realm and load chunks or just play lag is very noticeable and sound tracks and lagged )