Spirit Rend headshots stack separately with multiple sources

[Stack Man]

Usually, resist reduction from the same item does not stack with multiple sources, but Spirit Rend's headshots do.
The damage shown here is consistent with two sources of -28% resist from 4 stacks of Spirit Rend and only one source of -7% from Spirit Rend's base resist reduction.

View attachment Deadlock 2025-06-24 16-50-17.mp4