Closing the loop on this...in case it is helpful for anyone else facing this problem. We reverted firmware from 14.25 to 13.28. After doing that - the device crashes (which appear to incorrectly cite power problems) stopped. On 14.25 these had started happening once each day. We made it through three days of production with no outages. Fortunately for us - the site-to-site VPN bug (known issue in 13.28 / fixed in 14.25) did not hit us again during production last week. On Saturday - we removed both of the MX devices from production, and replaced them with a new HA set devices from a Meraki competitor.
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