A number of people, including me, have the same exact issue. I have also posted questions, but no one with Adobe has addressed a solution. I hope they respond soon and fix the issue. It's really slowing up what I'm trying to do.
I tried Premier Rush previously and whilst it seemed like a good programme, I had the same issue you've all had. So I uninstalled the programme and just accepted I'll use just photoshop and lightroom for my photos and find something else for the video. I won't name it because Adobe won't like me doing it but theres a programme that uses the surname of a famous painter and the word resolve. I haven't tried the studio version as you have to pay for that and I don't edit video enough for me to warrant paying for something, however the free version seemed to be alot better than Rush in my opinion.