If this is the same bug, I'm thinking of then its been around literally forever.

I am shocked they never fixed it and that it now spread to the new abilities.

It used to do this back in the day too. While it never ate any of my Contagions (back when that was in the game) it did eat more than its share of my Enkindles.

I do not remember it eating a Rouse or Spur though. But it might have as I usually used them in conjunction with each other so might not have noticed.