Impossible to scroll content in Webview

Actual behaviour

When the Webview displays a page with content exceeding the initial viewport (and requiring scrolling), it is not possible to scroll. In certain occasions it is possible to scroll a couple of lines, but not much more.
As a result, it is impossible to see the full page content.

Note: I tested it only from internal lan, and not using proxies, vpn, or myopenhab.org.
I believe the behavior should be about the same, since it is essentially about scrollbars.

Expected behaviour

On BasicUI, the same Webview will correctly scroll, allowing to see the full page content.

Steps to reproduce

Create a webview. The actual page should not fit into it.

sitemap global label="bug"
{
    Webview url="http://giallozafferano.it" height=20
}

The app will show only a part of the page, while in basic UI you can see the full content.

Note: it is important to set the height parameter, otherwise the app will simply display the entire content.

Environment data

Client

• Android version: Reproduced on a tablet with android 5.0 and a phone with android 8.0
• Device model: Medion lifetab 8.9, Sony Xperia XZ compact
• Stock or customized ROM: Stock ROM, in both cases
• App version: 2.2.0
• Build flavor: Full
• Device language: English

Server

• Server version: 2.3
• Reverse Proxy: N/A
• Authentication method: None

[mueller-ma]

I created https://github.com/eclipse/smarthome/issues/6077. IMO the basic UI should auto adjust the height if no height attribute is set.

[mueller-ma]

The change in the Android app is that the webview now won’t be larged than the actuall website content. You need to set a higher hight value for the webview.