Same problem on update to
Kernel: 5.10.0-19-amd64 x86_64, Boots OK on 18.
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 43 bits physical, 48 bits virtual
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: AuthenticAMD
CPU family: 23
Model: 24
Model name: AMD Ryzen 3 3200G with Radeon Vega Graphics
Stepping: 1
Frequency boost: enabled
CPU MHz: 1304.298
CPU max MHz: 3600.0000
CPU min MHz: 1400.0000
BogoMIPS: 7186.49
Virtualization: AMD-V
L1d cache: 128 KiB
L1i cache: 256 KiB
L2 cache: 2 MiB
L3 cache: 4 MiB
NUMA node0 CPU(s): 0-3
Let me know if additional information is needed for the fix.