I believe there may be an issue with overloads in General in Master content. I have noticed it today when running Master Lost Sector when Overload is suspended from a shackle Grenade, the sound would proc but any damage was negated and overload was still regaining health. I further noticed even when laying down constant fire with Osteo Striga the same also happening even while suspended as well.
Looking at the forums there seems to be others also noticing with other methods of proccing overload they also are performing similarly. This does not happen every time, but definitely enough to notice.
-
Yea I would hit him once and instantly his health was back