Bit curious about this, it seems to work fine for me. As far as my thinking goes, you'd need one of several things* to be able to pick up health orbs in particular:
- Less than full health
- Synth Fiber on companion
- Citrine passive healing aura not maxed out at 25 hp/sec
-Arcane Blessing not maxed out at 50 stacks
In Circuit, pets are noticeably unavailable so Synth Fiber's out of the question, and Citrine/Blessing do stop automatically collecting health orbs after a point. I don't mean to say there isn't some sort of a bug, but maybe one of these things is related? You could potentially use the Combat Discipline aura to damage yourself on-kill to be able to pick up health orbs.