Dark Souls 3

[Rock8man]

I just read up on instability because of Scott’s info above about invincibility frames, and it sounds like you’re getting hit during instability frames.

https://darksouls3.wiki.fextralife.com/Instability

Instability is a state in which the player is off-balance and receives 40% extra damage from attacks. The active window for this state is referred to by instability frames . Taking damage from an attack during instability frames results in an instability hit . Instability hits are communicated by a deep, reverberating “thunk” sound effect.

Those are the red squares in the chart posted above.