Dr. Brian

@Jay Sirrom

Owners can create a backup at any given time by downloading the world.  Any time you download the world, it also uses that download as one of the backups server side.. 

Just had this issue on 1.13 on Foxy No-Tail's Patreon Realm.  Two patrols spawned back to back, just strutting right through the end.  I was the only player online at the time.

Edit:  Immediately after leaving this comment, another patrol spawned.  Still the only one online.  Also maybe worth noting:  I don't see any Endermen in view distance.  I do have a small bit of water and a full beacon set up using emerald blocks.  Perhaps one of these items is being registered as a valid spawn location for them despite it being in the End?

Spent the entire evening trying to mine out a chunk and this problem was occurring the whole time with most blocks needing mined 3-4 times to actually break.  My Unbreaking III Diamond Pickaxe was worn almost all the way down after clearing 7 layers and it took 3-4 times as long to do it.  I might as well just make a bunch of iron picks and dismantle the beacon. 

This bug is nearly game-breaking and is most certainly not resolved in current version.

The only time I encounter this issue is when my my internet connection is very poor or there is a lot of network traffic.  You are likely being disconnected because your connection is timing out while trying to load all of the chunk data for the Nether.