When using a healer (e.g., Phoenix Quill or Morosbane Scroll), regardless of which pet, opponent, weapon/scroll, or turn during the battle, no healing actually happens. The arena indicates that the weapons/scrolls are activating, but Total Healing says "0" and the HP status bar does not change. I first noticed this yesterday, 10/29/20.

Which opponents did you notice this with?

i know you said "regardless of which opponent," but who are you fighting? i'm not having problems using my healers, and neither is anyone i've asked; are you sure you're not fighting someone with healing disabled?

I tried it with Eclipse and Moana, but now it's working with PSR. I didn't know that some opponents could disable healing, so I guess it's that. Sorry!

Glad you figured it out! :)