A new bios is out, F30, will have a play this afternoon i guess
Update AGESA 0.0.7.2 for Athlon 200-series (Raven2) APU and further new CPU support
Improve USB compatibility
Note : Update AMD Chipset Driver 18.50.16.01 or later version before update this BIOS.
Note : Due to BIOS ROM size limited, no Bristol Ridge APU support.
Maybe the 128Mb/16MB size limit is a thing is they needed to remove Bristol Ridge APU to additional CPU's...
Gigabyte AX370 Gaming K7 | AMD Ryzen 7 1700 (3.87GHz) | Noctua NH-D14 | G. Skill F4-3200C14D-16GTZ @ 3308/CL14 | EVGA GTX 1080Ti Hybrid | Dell 3008WFP | Samsung Evo 960 M.2 250GB, Samsung PM971b 1TB, 2 x Toshiba 2TB | Asus Xonor DX | SilverStone FT-02 | Corsair RM 650x