I also had a similar issue. I thought it was weird that one of my two cast n white or black spell quests started to outpace the other, when they both started at zero. Then one game it didn't track them at all so I restarted Arena. It once again only tracked progress on one of my three quests.
I also had a similar issue. I thought it was weird that one of my two cast n white or black spell quests started to outpace the other, when they both started at zero. Then one game it didn't track them at all so I restarted Arena. It once again only tracked progress on one of my three quests.