Unique voice follower not saying combat lines

[Ezarr]

I gave my follower some lines for when she receives damage (pain screams) but she doesn't say them during combat.

 

She does say them out of combat when she's in normal state, but the moment she enters combat she stops saying them.

 

However she does say her 'taunt' and 'attack' lines during combat.

 

Any ideas on what's going on?