Stone henge wall splashing on brick one

[Grobil]

On my active claim, I was replacing a Stone henge by a brick wall, destroying stone henge tile by tile, and building brick in its place, to fill the opening.
The destroyed stone henge wall (either a corner or wood door) splashed on adjacent brick wall segment, leaving it at 12% health.
So this damaged brick wall was located on the same row and following the same build directions than stone one, not in 'front off' or 'behind'.

[Judaism]

There are known bugs of splash damage, what causes it is very unclear to me. Certainly a bug.

[Heffernan]

JC!!!!!!! investigation pls asap

[Rifmaster]

Quick! Abuse it while you can guys!