Alvin at Vinshine has mentioned a firmware update in one of his most recent videos.
As suggested above in my initial post, I do not believe that any firmware fix has resolved the problem. It may be possible that it has helped in some cases, but I am certain that if the problem had been fully resolved, Denafrips would be shouting it from the rooftops!
Given the length of time that this has been a known issue, I really do not understand how anyone could be optimistic that it might be fully resolved by other than a hardware fix.