"I have no mana" line with Eldritch Battery

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Sethiel wrote:

I have all my mana reserved by two 50% auras and I use my energy shield to cast spells through Eldritch Battery. Sometimes, but not always, when I cast a spell, the character still uses the line "I have no mana", even though I have enough energy shield to cast it. It's a minor bug, but quite annoying. I would say it happens about every 10th use of a skill, maybe slightly less.

Reference number: 3201784909

Edit: Looks like it often happens the first time I use any skill in a given area.