Embedded report visuals not loading

We have a set of reports which are hosted on powerbi.com. We have embedded these into CRM Dynamics 365 using the native CRM report integration.

The reports work great most of the time. However some of the time the visuals selectively display on the reports. It is not always the same visuals as well - sometimes some display, other times others display. It is as if there has been an error loading the report visual from powerbi.com resulting in a partial list of visuals displaying.  If the user refreshes their browser (F5), usually all the visuals reload.  However if they are on a mobile device it can take multiple reloads for all the tiles to show.

It does not appear to be data related as we do not get the spinning "Refreshing Data" wheels, instead just dead visuals.  You can see this below (note I have removed some headings in the tiles for security reasons):

Anyone seen this before and know of a fix other than refreshing the screen every time?