I can't reproduce this on a Superflat world in Creative with any blocks at all.
It looks to me like an equality check needs changing from a <= to just <, as selectors shouldn't match entities on the very border of them.
2017-05-12, 11:45:34 PM UTC
input_scaled.mp4
Jack Wilsdon
MC-117418Jack Wilsdon
I can't reproduce this on a Superflat world in Creative with any blocks at all.
It looks to me like an equality check needs changing from a <= to just <, as selectors shouldn't match entities on the very border of them.