Sudden Crash

What I expected to happen was...:
Game would not crash

What actually happened was...:
Game crashed

Steps to Reproduce:
1. Create a flatland world (Overworld preset)
2. Punch tall grass
3. Maybe crash?

Description: Unexpected error

java.lang.IllegalArgumentException: Cannot get property azi{name=facing, clazz=class dw, values=[north, south, west, east]} as it does not exist!
	at ayx.b(SourceFile:120)
	at aqq.a(SourceFile:282)
	at bnw.c(SourceFile:154)
	at bnw.b(SourceFile:71)
	at bnw.a(SourceFile:48)