As noted the issue is being addressed driver update soon. With that said, the issue only happens with motherboards that are not PCI-E 3.0. In other words, older style motherboards or cheap motherboards that don't have built-in overload protection.
The other debate is why AMD left out the eight pin. There is overload on some of the Nvidia cards, but those cards do have eight pin power connection.
Watch this video from Science Studio, he explains that he tries to do a budget build using a Foxconn motherboard. https://youtu.be/rhjC_8ai7QA