"Nest"with Black line show

[Ray279052897upl]

Sometimes When I use "Nest...",it will appear a black line or hole in my video.

I think when I use twice a clip(ones to nest motion's key frame,onec to nest anthor cilp into it),it will happen more often.

I think it's a Bug,How to fix it？thanks!  

https://youtu.be/PjrfoUOZguY 

[Peru Bob]

If NVIDIA, try a clean installation of the 517.40 Studio Driver (NOT the Game Driver).

[Ann Bens]

Check your timeline: especially in the upper tracks.

[Ray279052897upl]

I find out if you use "Cross Dissolve"effect,it will occure often.So you can only use manual control to do the same effect.