Not sure if you have resolved the issue, but try using a PCI-e slot that doesnt have shared lanes. On my ASUS Hero VI with an Ryzen 1800x it was the very top PCI-e slot. The guy that posted it on REDDIT said he still got some crashes after , I however have not had any crashes yet heading on day 2. If you don't want to just guess like I did download your boards Manual or contact the boards customer service and see if they can tell you which one isn't shared. I will update if anything weird happens. Good luck, so far the wireless is awesome!
