World Lag

what i mean by repeating world lag not frame drops or any kind of fps downgrading
Example:
-Trying to break blocks wont register and take a long time to register(sometimes it wont break at all)
-killing mobs will make them freeze while world lag and sometimes despawn and sometimes kilp you intantly
-try and eat food and it wont let you
-cant open inventory edt..
PS:This is not any king of LAN or multiplayer its in survival or creative
Thanks for reading this bug report (if you read it)