I've been having on and off connection interruption issues. The troubleshooting guide said to post in the forum if the reset reason was different.

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.01-RC9 running on Duet 3 MB6HC v1.01 or later
Board ID: 08DJM-956BA-NA3TN-6JTD4-3S46S-KBALTUsed output buffers: 1 of 40 (26 max)
=== RTOS ===
Static ram: 154572
Dynamic ram: 160948 of which 52 recycled
Exception stack ram used: 484
Never used ram: 77160
Tasks: NETWORK(ready,44) ETHERNET(blocked,412) HEAT(blocked,1084) CanReceiv(suspended,3824) CanSender(suspended,1484) CanClock(blocked,1428) TMC(blocked,80) MAIN(running,4428) IDLE(ready,80)
Owned mutexes:
=== Platform ===
Last reset 99:08:14 ago, cause: power up
Last software reset at 2021-12-05 15:36, reason: Memory protection fault, spinning module GCodes, available RAM 77044 bytes (slot 1)
Software reset code 0x4163 HFSR 0x00000000 CFSR 0x00000082 ICSR 0x0440f804 BFAR 0x00000016 SP 0x20411c74 Task 0x45485445
Stack: 0040ff65 00410ada 61000000 20411d80 20429b84 20429b9c 0040ff65 204259e4 2042222c 20425914 0040c2a5
Error status: 0
Free file entries: 10
SD card 0 detected, interface speed: 25.0MBytes/sec
SD card longest block write time: 0.0ms, max retries 0
MCU temperature: min 42.5, current 42.8, max 43.5
Supply voltage: min 24.1, current 24.3, max 24.3, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 11.9, current 12.0, max 12.1, under voltage events: 0
Driver 0: standstill, reads 6155, writes 0 timeouts 0, SG min/max not available
Driver 1: standstill, reads 6151, writes 4 timeouts 0, SG min/max 0/322
Driver 2: standstill, reads 6147, writes 8 timeouts 0, SG min/max 0/334
Driver 3: standstill, reads 6156, writes 0 timeouts 0, SG min/max not available
Driver 4: standstill, reads 6155, writes 0 timeouts 0, SG min/max not available
Driver 5: standstill, reads 6155, writes 0 timeouts 0, SG min/max not available
Date/time: 2021-12-17 16:06:09
Slowest loop: 111.45ms; fastest: 0.21ms
=== Move ===
Hiccups: 0(0), FreeDm: 375, MinFreeDm: 373, MaxWait: 4692181ms
Bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0 CDDA state: -1
=== AuxDDARing ===
Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0 CDDA state: -1
=== Heat ===
Bed heaters = 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
Heater 0 is on, I-accum = 1.0
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 111.63ms; fastest: 0.03ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 1 of 8

• Ethernet -
  State: active
  Error counts: 0 0 0 0 0
  Socket states: 5 2 2 2 2 0 0 0
  === CAN ===
  Messages sent 29961, longest wait 0ms for type 0
  === Linux interface ===
  State: 0, failed transfers: 0
  Last transfer: 356894166ms ago
  RX/TX seq numbers: 0/1
  SPI underruns 0, overruns 0
  Number of disconnects: 0
  Buffer RX/TX: 0/0-0