Hi, did you click under the camera on the “transform” keyframe so it cant move anywhere other than the position and moment in time as you click on it and keyframe ?
For the crash problem maybe you can try this one - check my post at the very bottom for a possible solution. I fixed with it the crashes i had Movie Render Q working on dx 11 but not on dx 12? (Resolved!) - #3 by catz111
oh and just came to mind did you expand the camera cuts over the whole timeline from green to the end red line ? that awso can ■■■■ the location of the cam