I’m having a similar issue to the original issue in this thread. In my case, however, no thumbnail is being captured at all. It just retains the default white sphere icon. For trouble shooting I am using a blueprint I created from a PaperSprite which currently has no other components at all. I tried the viewport repositioning trick but nothing happens when I do it. In fact, every time I open the blueprint the viewport resets to the default position (default in this case is looking towards the visible side of the sprite, but at a slight angle. Any ideas? I’m running 4.20 on Windows 10.