FallingSand other than the default ones cause error when traveling trough end portal

When you go in the end and summon FallingSand other than the default (so not sand or red sand, anvil and gravel), it will cause this error message and the FallingSand won't appear in the Overworld:

Command

/summon FallingSand ~ ~ ~ {Block:dirt,Time:1}

Error

[23:34:15] [Server thread/ERROR]: "Silently" catching entity tracking error.
e: Adding entity to track
	at la.a(SourceFile:143) [1.8.4.jar:?]
	at la.a(SourceFile:93) [1.8.4.jar:?]
	at lb.a(SourceFile:30) [1.8.4.jar:?]
	at adm.a(SourceFile:883) [1.8.4.jar:?]
	at le.a(SourceFile:807) [1.8.4.jar:?]
	at adm.d(SourceFile:875) [1.8.4.jar:?]
	at lx.a(SourceFile:515) [1.8.4.jar:?]
	at pk.c(SourceFile:1754) [1.8.4.jar:?]
	at agn.a(SourceFile:69) [1.8.4.jar:?]
	at pk.Q(SourceFile:728) [1.8.4.jar:?]
	at pk.d(SourceFile:673) [1.8.4.jar:?]
	at uy.t_(SourceFile:92) [1.8.4.jar:?]
	at adm.a(SourceFile:1408) [1.8.4.jar:?]
	at le.a(SourceFile:600) [1.8.4.jar:?]
	at adm.g(SourceFile:1386) [1.8.4.jar:?]
	at adm.i(SourceFile:1279) [1.8.4.jar:?]
	at le.i(SourceFile:478) [1.8.4.jar:?]
	at net.minecraft.server.MinecraftServer.B(SourceFile:607) [1.8.4.jar:?]
	at net.minecraft.server.MinecraftServer.A(SourceFile:535) [1.8.4.jar:?]
	at bpo.A(SourceFile:152) [1.8.4.jar:?]
	at net.minecraft.server.MinecraftServer.run(SourceFile:451) [1.8.4.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_25]
Caused by: java.lang.IllegalStateException: Entity is already tracked!
	at la.a(SourceFile:116) ~[1.8.4.jar:?]
	... 21 more