Dear suppoert team,
I think I found the problem.
Since Deskscapes runs as a service, not as an app, the autostart order seems to be the issue.
On every display driver reset after closing certain applications, Deskcapes loses the backgrounds.
That's why I think, the autostart is just to early in the chain.
But I found a solution that works for the moment.
I just converted my background pictures for monitor 2 and 3 to .avi files,
then made .dream files out of them, and that works since a while together with an animated background on the 1st monitor.
So Deskscapes seems to find those .dream files better than the .jpgs after the display driver restart.