asus prime b350-plus

I have a PC based on an ASUS Prime B350-plus motherboard (latest BIOS 6203) and a Ryzen 5 5600g. After installing any extension card (GPU/Wi-Fi/etc) in the any PCI-e slot, boot process behaves as follows: I turn on the PSU, the system and CPU fans spins, the RGB works, after a moment all the...