I have solved Webview URL not changing on Android, and found a workaround.
There is in fact a disconnect between the Webviewer object and the block to change the URL. When using the block [set “Webviewer’s” URL to " "] it doesn’t work. This is also the same for getting properties of the Webviewer like X, Y, width and height.
However When creating the object using the Advanced [Any component] block and referencing it directly you can set/get the objects properties.
Example of workaround code:
Cheers!