What you were expecting to happen, and what actually happened:
Hind troop spell indicates it deals damage to an enemy and gain 2 mana back
After casting, mana remains at 0 and the troop doesn’t gain back 2 mana.
Expected: Get back 2 mana
How often does this happen? When did it begin happening?
Always. Use the troop in Arena
Steps to make it happen again
Play arena and select Hind troop (when possible)
Yep, that.
Cast her in arena and didn’t get back mana. Cast her in explore and did get back mana - first thought it could be Arena related bug. Cast her in explore again and didn’t get back mana…weird.
Then looked closer, cast a few more times and she indeed gets mana back if there are entangled enemies; no entangled enemies results in no mana gained back.