I posted on your youtube channel, but I'll post on here in case someone else can benefit. I had the exact same issue after Creator's update. I simply went into the icon options via Right-Click on desktop, View, and changed my icon size. I took it to large, then small, and finally settled on medium. For some reason, my icons began to behave normally after I did this. I was checking and clicking on everything just to mess with the options, but it immediately started working after I had manipulated the SIZE of icons. I can't explain why(yet), but it almost makes sense. The icons were behaving as if they were unaware of their boundaries. After a manual reset via the options menu, the icons settled.
If this doesn't work, the only other thing I can recommend is to update any applications that have an affect on your desktop(Especially icon organizers). Don't hesitate to respond if you have any questions or recommendations.