Rowanne is hitting dead first troop

Platform, device version and operating system:

What you were expecting to happen, and what actually happened:
I’m using the standard Rowanne team in the Faction Event. In many cases, once the first troop has died to skulls and disappears, the next Rowanne cast’s animation clearly shows damage being done in the empty first-troop slot. Is this related to the ghost troop bug that was never properly fixed?

How often does this happen? When did it begin happening?
Frequently in this Faction Event.