Build a wall of glass and throw snowballs at it: you'll clearly see they go right through as if the wall weren't there.
Same happens with eggs, ender pearls, bottles o enchanting, and thrown potions.
Comments 8
Dupe of MC-93607
Perhaps, but if so this is a better explanation of the bug than that is.
Very likely caused by the fix of MC-73884
It looks like they did revert the fix for MC-73884 in 15w49b. My guess would be that they left this open because their 1.9 development branch still has MC-73884 and they only removed it from 15w49b to not have snapshots with such a crazy bug.
As for "Fixed in 1.10", it was momentarily closed that way (I'd guess that was just an accident of some sort) and apparently the "fixed version" field doesn't automatically get cleared when the bug is reopened.
Dupe of MC-93607