[ADDED TO REPORT] One color gear causes none Hero spells to not gain mana

[Sibelios]

The specific connection of facts I’m not certain about (hero/non-hero spells) but the issue is overall probably the same issue that has been documented in:

[FIXED IN NEXT UPDATE V.36] Mana accumulated on first turn match not reporting available to cast spells

This won’t be a quick client side fix, so our devs are bundling a few fixes to it in our next bigger update. It will be a little longer wait, sorry for the inconvenience and thank you for your patience.