Error version bios 3.10 for B450M and B450

I have a B450M board with AMD apu 2200G and it works for over 6 months.
Version 2.0 bios worked flawlessly.
The new version 3.10 has a bootloader problem.

After updating the bios to 3.10 board / bios can not see any disk (SSD and HDD).
Also, doesn't see any of the boot partitions.
The CSM on / off feature also does not work and is a buggy.
Occasionally, after the bios reboot, all partitions on all disks appear, but they do not see the reboot again.
One in about 20 attempts, partitions appeared all partitions and I introduced the system.
They are not visible again after restart.

I have GPT / UEFI Linux + windows 10 and there was no problem with bios 2.10.

The second issue concerns not working downgrade bios from Flash Disk.
I tried downgrade bios from 3.10 back to 2.0 with a flash drive.
Bios sees Flash disk and bios files, but either the bios 2.0 screen will blink and the bios downgrade will not start or write "invalid file".
Also Downgrade 1.2 version of bios not work.

It only worked downgrade from Windows 10.
But very hard to get into the system due to cycling problem with bootloader not see HDD, SSD.

The same problem has another Internet user, I'm not alone.

[URL=https://www.computerbase.de/forum/threads/asrock-b450-pro4-boot-probleme-und-komm-nicht-wirklich-ins-bios.1861866/]https://www.computerbase.de/forum/threads/asrock-b450-pro4-boot-probleme-und-komm-nicht-wirklich-ins-bios.1861866/[/URL]

Hello mate, I have Ryzen 5 1600x, and I have ASRock B450M-Pro4 I was perfectly fine with 2.00 Bios, but this morning just 1 hr ago, I saw the new Bios 3.10 and I saw AGESA update and I did successfully update the Bios to 3.10, but after I found many floods in it, I couldn't control fans, and other stuff, I was OK i will downgrade to 2.00, and when I Run Instant Flash, screen kinda freezes for 3 seconds and gives me the Invalid File, tried from 2 different USB's and I keep trying but I cannot go back to my awesome 2.00, you mentioned a windows downgrade but I have never done that is that safe what did you do?
I do have this issue and I really don't know what to do?

Oh mate, I feel so bad that this happens to you in this way, my all issue was I was all good and fine on Bios 2.00, but as I said in the first response I saw that the AMD Agesa was updated, and I really wanted to see what new is been brought in! And yes without problems I managed to flush from 2.00 to 3.10 but the thing with 3.10 was very messy. Half of the things of 2.00 were gone, Tctrl for fans was gone, I mean much other stuff was gone, nothing improved just added SOC voltage to CPU in which in 2.00 was never there just VID core voltage, I couldn't control my fans on my AiO, on my case nothing, because you know that AMD has an offset for temperature, in the bios CPU temp always stays 60c and don't move up or down. And the AMD offset is 20c+ from normal, my fans were speeding on full speed 2000 rpm, in which I never want them to go that fast tho! And after many searches in the bios and tweaks, I really couldn't do anything, and for some reasson, the SOC voltage was not been implied? I had enough and I was ok, I want my old bios back the 2.00 one, I downloaded from ASRock web page where my MB is, added on USB and went to Instant Flush and when I am clicking the instant flash the old bios 2.00 is been shown, it says Update or Cancel and I click Update as normal but right there screen froze for maybe 15 seconds or so and I get "Invalid file" message?! I was like, hmmm, what is this? Ok downloaded again added on another USB, guess what the SAME thing, I tried 15 times all same. And I remember that you said that you managed to downgrade back to 2.00 with the Windows flushing?! I was like ok I am doing this, and I downloaded the Windows BIOS file and I executed the file, and for some reasson, everything went fine PC restarted and started to downgrade from 3.10 to 2.00, it finished and I was back to 2.00, FINALLY !!! And for now, there are no issues all cool as before I managed to restore my saved profile for Overclocked CPU and all other stuff on Bios. And I am never ever going back to 3.10 too much risk, If ASRock add some new one improved maybe, but I am totally fine with this one, my board and CPU and ram are brand new I bought them 2 months ago! So I am totally pissed to see that you MB got corrupt and CPU, are you sure that even your CPU is damaged throughout the process? I am speechless from ASRock man, they never released such a bad BIOS by now, I am with ASRock long time, but I did a mistake when I was buying this board I should have bought an ASUS one, but I was like I know ASRock they are easy to work and I know the bios. But I guess something very bad is happening with their BIOS'es now.

ASRock obviously knows the uefi version 3.10 is crap.
The reason I say this is because it's available for every AMD *4** series mobo, except for the X470 Taichi Ultimate, which I have.
It's available for all the B450 and X470's except just the X470 Taichi Ultimate.
Check their website for all the mobo's bios download page and you'll see the only board missing the 3.10 uefi is the X470 Taichi Ultimate, yet the regular X470 Taichi and all other's have it.
Just by reading this forum everyday, I'm sorry I didn't go wirh ASUS again.

In regards to firmware 3.10 disabling hdmi sound. Im running a 2400g Ryzen and Saphire Pulse RX 580 4Gb card on the b450 fatal1ty itx board.