Possibly related to this... I don't recall if the secure indicator was working (or not), but within the past few days sites that were set to open in the secure browser do not. My default browser is Chrome, and previously a green-bordered, extension-less Chrome instance would open for my banking sites.
I did notice that Eset had changed the sites' favicons in Chrome, but that has reverted back in the past few days. I can manually open the secure browser, and that seems fine.
The sites are definitely set to use secure browser in Advanced Setup. I've also tried variants like adding www or the index.html landing page, with no success.