Need help with tail gunners of TU95 and TU22

[J13 Serenity]

Hi 
I need Tu95 or Tu 22 to fly straight and level under attack and use their tail gunners to defend (like B17 or A20)
But no matter what I am doing in editor (reaction to threat, ROE, ECM,Chaff, mission type, skill, AWAKS, Loadout etc...)
I can only get two behaviours
They either fly straight and level but never fire a shot from their tail gunners.
Or they fire, but only while maneuvering...

Is there a solution to this problem?
Thank you