Finder problem in new Mojave installation
I just performed a clean install of Mohave on a six month old iMac. The problem is that I can drag and drop files a few times and then an image of the file gets 'stuck' to the cursor. I can force the finder to restart and the immediate issue disappears but the next drag and drop it is back. I've tried everything I can think of including reinstalling the OS but this issue remains. Is there something in Mohave that is brand new and I'm missing something obvious?
I was very careful in building up this new system from scratch, reinstalling all my apps from new downloads and eliminating all the old garbage that had accumulated over many years of upgrading the OS over the old ones. I'm stumped.
iMac 27" 5K, macOS 10.14