As you can see in the screenshot, selected Reve(2).001 scene is 965 long (duration in the N panel)
But at frame 250, it simply stops rendering and indeed, green filling stops at 1470 of the main timeline (1220+250), where I set my playhead.
I double-checked the imported scene and the strip tabs in the scene, AFAIK there’s no 250 entered anywhere as an end.
Or did I miss a 250 somewhere?
Thanks for your help!