Enemies casting when silenced due to traits


I’ve been running with the Supersonic trait - at the start of battle enemies are affected by Silence for one turn.

I’ve noticed enemies still get to cast on me before the first turn/at the start of battle, and it seems like it’s due to traits that allow them to cast spells. For example the Vulpes traits or Hotspur from the Salamanders.

Not sure if traits like this should be bypassing silence.