Having the same issue reboot due to Kernel panic 🤬🤬🤬 apple support just recommended reinstall OS 🤦♂️
MacBook Pro (16-inch, 2019) current MacOS Big Sur 11.6 (the issue still observed)
Dell Thunderbolt Dock WD19TB
panic(cpu 4 caller 0xffffff800b89fc36): [kext.kalloc.2048]: element modified after free (off:1672, val:0xffffffff00000000, sz:2048, ptr:0xffffff9383b7f000, prot:zero)
1672: 0xffffffff00000000