Weird restarts with Dell S4820T force 10 switches

Hi guys, im having problems with S4820T switches, they randomly reboot and then go into a boot loop, this is what i see during startup, it seems to happen ever 4 weeks or so and i've no idea what's going on, i have only configured stacking with QSFP+ 40G, port channels and vlans, nothing crazy

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** /dev/rld0g

** Last Mounted on /usr/pkg

** Phase 1 - Check Blocks and Sizes

** Phase 2 - Check Pathnames

** Phase 3 - Check Connectivity

** Phase 4 - Check Reference Counts

** Phase 5 - Check Cyl groups

16867 files, 316210 used, 1996237 free (2845 frags, 249174 blocks, 0.1% fragmentation)

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MARK FILE SYSTEM CLEAN? yes

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***** FILE SYSTEM MARKED CLEAN *****

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***** FILE SYSTEM WAS MODIFIED *****

Starting Dell Networking OS

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panic: trap: pid 403.1 (sysdlp): DTLB exception in kernel mode (tf=0xfbbc5958, dear=0xdeadc057, esr=0,
srr0/1=0x7e6ae4/0x29200)

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Saving MMU state @ 0x84000