Hello,

Just updated to the new bios version:

Version 5406 2019/11/2514.65 MBytes
PRIME X470-PRO BIOS 5406
Update AM4 combo PI 1.0.0.4 patch B

And got in a lot off trouble, storage devices reacted slow, LAN adapter didnt work, and my Creative AE-5 didnt work!
When i looked in Device manager i noticed an error in my ASMedia device and varios other USB controller error's.
Also loading of my Ryzen Master didnt work!
Finally cleared the CMOS and reflashed the previous bios again (phew!).

When i google around, i found more people experiencing these problems with other mainboard brands and the 1.0.0.4 patch B update.

Sys specs:
AMD 2700X
Prime X470-PRO
2x8gb
2x16gb
Samsung evo 960