Platform, device and operation system
What were you expecting to happen, and what actually happened
Several instances of mana non-accrual from gem matching have been reported recently. This is my specific experience.
In this case, it was a Restricted PVP match in which my only gem match move was a 4 gem green match in order gain enough mana to cast my equipped spells: all green spells, 3 @ 50 mana cost (Channel Poison, Acid Arrow, Insect Plague), 1 @ 60 mana cost (Poison Spirit).
As depicted here, my 4 gem match was sufficient to completely fill the mana requirements of all 4 spells, however only Poison Spirit shows as activated; the other 3 are showing only the starting mana which is from the Citadel Bonus; no other starting mana in effect.
Once I cast Poison Spirit, the remaining 3 spells reverted to their correct state: activated from the previously accrued mana sufficient to fill their mana reqs as well as Poison Spirit.
How often does this happen? When did it begin happening?
I was able to replicate this scenario in 4 straight pvp matches today, details identical to above. To the best of my knowledge this began with the 0.35 Update.
Steps to make it happen again
I have not seen this in any of my other setups but others detailed similar circumstances in the 0.35 Updated thread. If I can replicate additional scenarios, I will update this thread.