I have two mining rigs with AMD RX 5700 XT and RX 5700 cards, as well, and both of those rigs are "dead" within a day of each other, within a few days of updating the drivers to newest Adrenaline a few weeks ago. They had been mining for over a year straight.
More worry-some, I have some rigs with RX 6600 cards, that after a recent driver update, they crashed, now the GPUs don't show up in Windows, even after a cold- boot.
So yeah, I've lost a NUMBER of RDNA1/RDNA2 cards, after a fairly recent driver update, seemingly. I have suspected a recent driver update, but was waiting for confirmation.
Edit: MSI Afterburner may have been installed on those rigs as well, and probably not as up-to-date as the drivers.
Could (maybe) be some sort of "bad" interaction between recent drivers and AB, that's pure speculation.
I've had fan-speed-stuck-at-zero (with GPU temps cresting 84C) problems with various Adrenaline drivers and the Nicehash client software running in Windows (seems like long-standing bug? Had that problem back in the day with R7 250X cards too), keeping AB running seems to sort of fix it.