[MC-194787] End City/Ship spawning broken

Put the summary of the bug you're having here

What I expected to happen was...: End city/ship spawn normally. When loading new chunks, end cities and ships should spawn as normal

What actually happened was...: The city 'rooms' as well as the ships seemed to be cut off at random chunk boundaries

Steps to Reproduce:

Create New world
Go to end and defeat dragon (this is probably not required but its what I did/have done)
Warp through portal with ender pearl
Find/warp to end city (vast majority I found doing this had issues)