Reproduce:

• Create an html file and write "Hello world" in it
• Start a webserver to serve this file (e.g. on localhost:8081)
• Create a dashboard and add the file as an external report
• Goto the dashboard view mode and activate autorefresh
• Change the html file to say "How is it going?"
• Wait for the autorefresh to fire

Expected:

• Dashboard tile showing the external report is updated to show "How is it going?"

Observed:

• Dashboard tile showing the external reports still shows "Hello world"