Hi Klaus,
not sure if this is a bug, a conflict or something incompatible.
I tried a bit but can't get my head around it atm..
if you move around with the thumb control (I made it for desktop also for convenience) it works all fine..
But if you click, or tap, just shortly the thumb control, it breaks the crop animation.
I found this problem, breaking, with other scripts as well.
https://www.virtualtuur.com/krpano/120/issues/interval/1/
What would be a good fix for the thumb control to not behave like that?
Tuur