[MC-84723] Game Crash on Multiplayer - Spectating Fence-tied Leads in spectator mode

When possessing a Fence-tied Lead in Spectator mode, the game crashes entirely and gives an error message. This only happens after a chunk is unloaded then reloaded, and for the time that it is loaded, only on the first occasion of possession does the game crash.

java.lang.NullPointerException: Unexpected error
	at axv.b(SourceFile:119)
	at axv.a(SourceFile:70)
	at axv.a(SourceFile:53)
	at axn.a(SourceFile:218)
	at bhn.a(SourceFile:1019)
	at axd.at(SourceFile:900)
	at axd.a(SourceFile:323)
	at net.minecraft.client.main.Main.main(SourceFile:125)