When the new mouse was instituted, the cursor was not present when you stopped recording and had that dialog box pop up.
This was fixed.
This saturday I noticed the exact same bug but on the gunner acceptance dialog. Normally I have such things show in the console, but sometimes it resets itself for no reason. I got a gunner but had to click the box. There was no mouse to do this. It didn't seem to have a highlight for a spacebar and I didn't want to reject him (it was a scenario, I needed a gunner).
I brought up the clipboard because I have that toggled mapped to a controller button, once that was up I had the mouse back and clicked "accept."
Need to do whatever you did with the film name dialog, but do it to the gunner dialog.