Thanks for the reply Erel.
Apologies, as I initially did not provide enough info: my problem occurs after I get past the login screen (see attached screenshot).
I can only assume B4J's webview wrapper control just can't handle some web page content (as I've seen issues with other web pages too). And I suspect there is no way to 'View source' for any page loaded into the control (and debug it like in Chrome or Firefox) when these page loading/rendering issues occur - correct? I can't find a B4J error log, and no errors echo to the log console when running my app in debug mode either.
Much of my app relies on reliably displaying web URLs in the manner mainstream browsers does. So any suggestions or tips will be appreciated; I've searched the forum and oddly have not found others raising this same issue.
P.S. Is the native webview used really based on Safari, no longer officially supported on Windows?