Good morning,
I have a movie in multiple tracks on the timeline, I open the project and play it I can see everything that is there in the preview.
Then I put more one image or text to continue my work.
when I playback again parts of what was well simply disappear from the preview.
I´ve done 100 seconds in 4 tracks + audio track with no problem.
Now every time I try to put anything new it starts to disappear everything.
My computer is a dedicated one to sound and video and meet all the requirements of the software by far.