WebView content causes SiteMap Back Arrow not to work (Bug)

There is a weird bug when I try to display a DarkSky weather synopsis in a WebView on my sitemap (see code below). Depending on what is visible in the WebView the SiteMap Back Arrow button does not work!

The DarkSky url shows a weather synopsis at the top of the screen plus a weather map underneath; the behaviour of the SiteMap Back Arrow Button depends on whether the map is visible or not, as follows…

  • If the WebView is sized (height=10) then the weather map is not visible, and in that case the SiteMap Back arrow button takes me back to the Sitemap index page.

  • But if I scroll the WebView down so that a part of the weather map becomes visible, then the SiteMap Back arrow button does NOT work.

sitemap 24g label="xxx" {

    Frame label="Overview" {
        Text item=Local_Date
        Text item=Local_Time
        Text item=Local_Weather_Current_Condition {
            Webview icon="none" label="xxx" url="https://darksky.net/forecast/53.1954620,0.1203847/ca12/en" height=10
        }
  }

=> Any ideas how to fix this?

PS it depends on whether the WebView height is large enough to accommodate the whole map picture in its borders; in other words, the following code (height=10) causes the bug to happen…

Webview icon="none" label="xxx" url="https://darksky.net/forecast/53.1954620,0.1203847/ca12/en" height=10

… whereas the following code (height=60) works perfectly…

Webview icon="none" label="xxx" url="https://darksky.net/forecast/53.1954620,0.1203847/ca12/en" height=60