David

Mobs not spawning and wither skeletons not spawning.

Crops growing EXTREMELY slow

Enchanted tools/weapons Visual glitch

Buggy harvesting/planting crops.

Guardians/Elder Guardians WAY too powerful

Pigmen Don't come through portals to the overworld naturally.

Inventory lag (In Realms atleast)

Villagers not giving XP for all trades. (Mainly carrots and potatoes)

Achievements Not Being given.

Beacons on Realms are EXTREMELY laggy.

Enderman not being attracted to endermites consistantly

map room, beaconator, and treasure hunter achievement not working.

Villagers not farming and throwing crops correctly.

Villagers disappearing out of farms.

Packed ice/ice doesn't instant mine (Realms for sure)

Can't Download Realm Copy

CAN NOT DOWNLOAD COPY OF REALM

Realms Backups delete Inventory and Ender Chest Items

Block Lag On Realms

Guardians Not Spawning Correctly In Drained Monuments