Sorry for the late reply, work really picked up after I had posted this and I had forgotten to reply. I've included a picture of the relic item that I think isn't working properly, along with the display in game that I think isn't quite right.

To go deeper into the build, I have relic items each with the relic bonus of +5 hp/s stat bonus. If possible, they also have the non-relic + hp/s stat bonus. I also bring Artifical Organs and Artifical Organs II to add an additional 50 hp/s + 100% to any health per second bonuses. There are also some passives from defense and suppression that add even more hp/s. This ends up leaving my base health per second somewhere between 200 and 300.

The relic item in the picture is supposed to take that and add a percent bonus based on missing health, meaning I should be able to get around 600 hp/s when close to death. What I think is interesting is that this health per second is displayed when I hover over the health bar in game when hurt, but I don't think it is actually active.

What I mean by this is that while the game claims I have 600 health per second, watching the value by hovering over the health bar shows that my health value isn't actually going up by 600 each second.

 I know I'm super late to reply, but any help would be appreciated!

Edit - I can get the other perk and passive names if needed, but I feel it's probably the relic bonus, so I only really included that.