In the realm/server that I have payed for, when I spawn mobs or when I shoot arrows, they have very low frame rates, and move in a blocky fashion. To go further into detail of what I mean, it looks as if these mobs have a bad internet connection, and almost rubber band across the map but at a slow pace. I hope I have made my problem clear. Thank you for your time.
The problem may be the connection between your router and the realm host. It's just slow, even though your frame rates don't drop.