I have found that with the renew and cure while I am moving and shooting my feet, It does not register. I have to stop, shoot, and then keep moving.
I also notice that when I use gravity well and monsters are pulled I have to wait a second or two before I can shoot a poison orb and have it register. This happens regularly when doing the event closest to Highsteppe. Often the orb will explode but none of the monsters will have a status effect if I shoot to quickly.
I have also had issues with not being able to grab orbs. It is not excessively bad, but if grabbing / not grabbing a cure at the last moment keeps me from or someone else from dying, then it can be very frustrating knowing your skill is better than the “equipment”.
The light well does need to be turned down on the brightness.