Yes I have seen similar things happen in ArcGIS Enterprise , particularly when working with hosted service views but also had a problem with traditional map services. In my experience it was only ever occurring in dashboards, not in the web map view or in web app builder apps.
In the case of the traditional map service it seemed to go away when I republished the service from Pro (had previously been from ArcMap). I've never quite got to the bottom of it with the hosted services and have been meaning to raise a support ticket with ESRI about it.
I think it is possibly related to what is described in this thread
Solved: Error: <circle> attribute cx: Expected length, “Na... - Esri Community
If you turn on your browser's developer tools console do you get the error messages seen in the thread above about attribute x/y expected length NaN? That's what I get in my example 10.8.1 dashboard based on a hosted feature layer view (works fine if I use the original hosted service instead of the view).