Phoebe Heal Circle Bug (attack mode)

I have repeatedly had an issue with the heal circles Phoebe sets up in attack mode. Despite the circle being cast under you it fails or hangs up and does not heal you or the units for a few turns. It doesn’t happen every time and usually behaves, but I’ve counted up to 3 fails in a row on the occasions it misbehaves (tests have been both in the front line, in the damaging areas, and near the rear away from all immediate damage). 

Windows PC