So Back in 1.11, Our Realm started to have this issue with lag, not FPS, but like a delay in which it will move us back in our previous spot roughly 2 seconds ago from where we were... and we have no clue whats causing this.. at first we thought it was the Repeating Command Blocks from our Dungeons, but 1. I thought command blocks didn't run when they are in unloaded chunks. 2. I turned them all off and the issue still remained.
But now I can't find any other reason. Is there a possibility to where the realm in which the server is being hosted on is being laggy? Or any other issue? There is no redstone clock or anything of the sort.
Could the problem be due the amount of world explored or anything?