Is anyone else not having their healing items working during combat? Whether it's an item that heals and damages like Arrow Harpoon or something that only heals like the Phoenix Quill, it doesn't appear that any of it is working for me right now.

Who are you battling?

I've battled Moana which is where I first noticed it and wondering if it was an effect of hers, I battled Aboxalypse a number of times with the same effect.

Ok: update Didn't notice that Aboxalypse had the same effect before, but it seems to be working when I tried battling Buttwing Bomber.

Moana I am pretty sure blocks healing.

Yeah, certain opponents have certain things disabled when you battle against them. Some disable healing, freezing, stealing, scrolls, or sometimes one opponent will have multiples of those things disabled. It just depends on who you're battling.