Sigarda, Heron's Grace semi-hexproof bug

Biffley-do

The text on Sigarda is ambiguous, but recently I came up against her twice. Both times I had two removal spells (Grip of Deslation and Unholy Hunger). Both spells were able to target Sigarda, but upon pressing the go button, nothing happened. Spells went uncast. When cast, Sigarda doesn't register the Hexproof symbol.

Coalition mate alerted me to the same problem: he cast Scour from Existence on Sigarda but it had no effect.