Chart displays on web browser but not in OH app

I’ve put in 3 charts (e.g. Chart item=Temp_lounge period=D refresh=60000) into my sitemap.

this seems to display ok in my web browser, but not in the app (just comes up as blank page). Any ideas? Reading through some threads the solutions don’t really work - one suggested putting in refresh, another service= - but none of these solve my issue.

any ideas?

If you use refresh options with small value this can be cause to not display in hab droid.

Please look Graphs not displayed on App