Have you checked the board's BIOS. Out of the box my board could not support the 5800. After updating the board's BIOS everything was fine.
The b550 board is not compatible with the 1000x series of ryzen processors. I am not sure how it was successful initially. However, I believe it is a driver issue. If the board has an independent flash option, I would perform that. If it does not, I would bring the board into your local micro center to have them perform the update.
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