MisplacedSpirit

Update:
Ok so i have done a little more testing using the commands and it appears that hostile mobs are not despawning at 128+ blocks again in 1.14.3 as they should again, similar to what was in MC-147890
Standing 4000 blocks away from world spawn I can execute a data get command and pull the POS of these mobs which shows them being in spawn chunks and not despawning after I left the area.
Which I assume is why there are little to no hostile mobs spawning around the location I currently am.

Having the same Issue after upgrading from 1.14.2 to 1.14.3
The Guardian farm i was working on in 1.14.2 was dangerous to be in the water. After 2 days of playing on 1.14.3 i have seen maybe 4 Guardians total, no hostile spawns at nights, even on unlit nearby islands. Only mob i have seen spawn in are Phantoms after going days without sleeping. Will look in to this more when i get a chance tomorrow and see if i can narrow it down any.