[BLOCKING] All named entities no longer have their names

Release_768287
1.2.13 release 3

Summary: All named entities have lost their names

Impact: Commands can no longer be executed from named entities since they've lost their names, which will break many maps.

Repro Steps:
1) Open Ultimate Minigame Rush
2) Hit the how to play button to your left
3) Notice how the chat has messages from "<Squid>" instead of "<>"
(For a more game-breaking example, open Santa's Sleigh Ride and observe how the golden rings do not provide fireworks)

Observed Result:
All entities have lost their names.

Expected Result:
All entities retain their names so commands can be executed from them.

Screenshots/Videos attached: Yes