Panic String: sleeping thread

[w0w]

On the last month I have two crashes occurred during update, both are related to sleeping thread.

Dump header from device: /dev/ada1p3
  Architecture: amd64
  Architecture Version: 4
  Dump Length: 96256
  Blocksize: 512
  Compression: none
  Dumptime: Mon Feb  8 21:57:03 2021
  Hostname: xxxxx
  Magic: FreeBSD Text Dump
  Version String: FreeBSD 12.2-STABLE b102db12494(devel-12) pfSense
  Panic String: sleeping thread
  Dump Parity: 4141183774
  Bounds: 0
  Dump Status: good

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