In the Arranger window, I've imported several videos (actually just WAV files). I've done this dozens of times in the past with no problems. This time, however, every one of the objects flickers and disappears. It's still there, but to make it reappear, I have to click on it again and it only stays as long as I have it selected. This makes editing slow and tedious, like looking for objects in the dark. This is in Movie Edit Pro MX Plus.
Additionally, I like to look at the sound part of the object to see where the speaking is taking place and target long pauses and silence to be edited out, but for some reason, all the sound objects as flat lines.