Mark,
I was about to report this situation, but just happened to look in the Announcements Forum and found - Fund Manager 2020.16.6 Available. I didn't receive the usual notification from within FM so I didn't realize this update existed. I'm glad I checked though before reporting this issue because as your changelog indicates, this addresses the exact problem I was having and has indeed fixed it! This post is just to confirm that the fix worked. Thanks much...
Max