Hi,
It seems like an explosion kills a mason on a wall. It is kinda unusual, I guess It is a bug.
Can you reproduce it every time?
It looks like only the will o' the wisp of the magus kills the mason on the wall, and same wall get the damage too.
One more problem with the mason: if it is on a wall the relic of the mason disappears, it comes back when the mason climb down of the wall.
relic part is correct, mason in the wall is inorganic
I was able to reproduce the bug and we will get it fixed asap. Thanks!