Yet another case of "support" = "no support at all"!
Following the link provided, you end up at a page which offers articles (NOT support), with a cokkie-gated button at the bottom saying "Need more help? Contact Support". Clicking on that takes you to a page with the following message:
This page is temporarily unavailable as our systems are currently undergoing maintenance.
This maintenance period is expected to end on January 5th, 2023, when this page will be available once again to take your inquiries."
Having raised 2 other issues with both AMD and Sapphire regarding my 7900XT (vertical compression of entire screen on 2nd monitor and completely borked Realtek sound output, both of which remain unresolved for 2 weeks), I won't be holding my breath.