It's fine in my case (Hubtat Dashboard app) as I can just parse out the URL and use that without the container tags (<div><object>...)
FWIW - there's another driver that does something similar - gCalendar. It wraps a URL and I looked at the driver code and found this:
theCal = "<div style='height:100%;width:100%'><iframe src='${gCal}' style='height:100%;width:100%;border:none'></iframe></div>"
At least with my app the gCalendar tile displays better than it does with that <object> tag.. but, I'm not an HTML expert so just relaying what I've seen
