If you're running the "old" Edge, then try upgrading to the "new" Edge, which is Chromium-based and looks and runs a lot like Chrome. Supposedly the next Windows update will include the new Edge automatically, but no reason to wait. I've been running it on a couple of machines (Mac and PC) and am happy with it so far.Update. Realized my old W8 machine used Firefox. New W10 machine is Edge. I tried using Firefox and copy/paste works. So it appears to be something in Edge.... Again - is there a setting for this?
https://www.microsoft.com/en-us/edge