Turrets don't work on most bombers

[xnomad]

I got no joy asking this in the technical thread section (33 views and no replies) so copied it here:

The turrets and iron sight view on most bombers don't work for me.
Is this a known bug, something broken by the patch, or am I doing something seriously wrong? I searched for 'turret' but didn't see a thread talking about this.

I only just started messing with the gunner positions today. The He-111 tail turret seems to work fine, I can go into gunsight mode, use my joystick to yaw and pitch the gun and I can move the turret/mount with arrow keys.

However, I can't do the same with the tail/turret gunners on the Blenheim and Ju-88. I also can't use the other postions in gunsight mode in these aircraft as well as the others on the Heinkel.