Could you share the operation view and map demonstrating this problem? This would help provide some indication of the underlying problem.
I know its weekend, but any chance that you got a bit of time to enquire into this problem.
I'm not sure if you ever solved this but I am experiencing the same issue. I found that if I create a bookmark at the desired default extent for my webmap and add the bookmarks capability to my operations dashboard map then I can get my map to show up by selecting the bookmark. It's not ideal but it verified that my webmap was in fact compatible with the dashboard.