When playing Elite Deep Archimedea with Nourish as a subsumed ability, it doesn't work most of the time. It never activates, adds a buff icon, a cooldown on the skill bar, or adds damage to the weapon. The warframe will cast and play the animation, but nothing happens afterwards. This is the problem most 95% of the time through the entire set of 3 mission, but sometimes on rare occasion it will work.
This was while being host and having it subsumed to Dante replacing his #1.
The missions were Alchemy, Mirror Defense, and Assassination. At one point, I was able to activate the skill once during Mirror Defense, but not at all times.
None of the missions shared the same deviations or Risk Variables, so I assumed it may be related to one of the debuff choices:
Ammo Deficit, Gear Embargo, Energy Exhaustion, and Secondary Wounds. Intuition tells me its probably related to the Gear or Energy debuffs, but I'm not sure.
I have not been able to replicate this outside of EDA.