What version is the firmware at? Can you check to see if the hardware watchdog is enabled?
remote-exec <unit id> wdogctl
it should show mmcx0, 60 second period
Dell EMC Real Time Operating System Software
Dell EMC Operating System Version: 2.0
Dell EMC Application Software Version: 9.14(2.0)
Copyright (c) 1999-2019 by Dell Inc. All Rights Reserved.
Build Time: Fri Apr 26 09:57:57 2019
Build Path: /build/build01/SW/SRC
Dell EMC Networking OS uptime is 6 day(s), 21 hour(s), 2 minute(s)
System image file is "system://B"
System Type: S4048-ON
Control Processor: Intel Rangeley with 3 Gbytes (3201302528 bytes) of memory, core(s) 2.
8G bytes of boot flash memory.
2 54-port TE/FG (SK-ON)
96 Ten GigabitEthernet/IEEE 802.3 interface(s)
12 Forty GigabitEthernet/IEEE 802.3 interface(s)
However I cannot get that "wdo" command to run
% Error: Invalid input at "^" marker.
Ok, in that case can you see if there are any errors in the logs around the failover time?