When I try to view the live dashboard version an extension from stream manager, the height of the iframe containing the extension is only 150px. This issue is only occurring on Safari as far as I can tell. I have not had the issue in Firefox or Chrome. I have tried multiple extensions, and it seems to happen on all of them when using Safari. Viewing the viewer panel version of an extension does not result in the same problem.
So on safari, i found if you click the 2 AA’s to the left of the bar, and click the lower one til you zoom out to 50% the page then works normally. Hope this helps