I think you have face me and crowd frenzy mixed up. Face me activates when Gulk is inflicted with passive DOT which NF's internal bleed counts as. In both pictures Gulk has internal bleed on him so he should heal some of the damage from the sp3.
In hulk rags kit is says whilst face me is ACTIVE he will regen 70% of damage taken. I threw my sp3 as shown below BEFORE he was in face me, and still regens the damage taken, and costs me a death…
You died to an unduped Ghulk.....with NF?