I’ve found two solutions, or should I say ‘work-arounds’….
I’ve just opened a trimmed project that I archived a month ago to re-version. All of the video clips have the diagonal lines across them and there’s no way the clips are too short as I didn’t archive with handles.
I’ve found a very tedious and painful work-around, but I do suggest that Adobe look at this, as the Project Manager isn’t reliable at all.
What I’m doing is right-clicking on each of the clips on my timeline, and ‘revealing in project’. Then I copy that clip, and then return to the clip on the timeline, and ‘replace with clip>from bin’ and that relinks it, so you can see it in your source monitor.
Luckily I’m only re-linking a promo, and not long-form.
Failing that, I’ve just done a test where I’ve archived my trimmed project to my local HD, rather than remotely to external storage. I don’t get the diagonal lines! Hooray
Looks like a big that needs to be fixed.