Machine reset/restart

New problem, mid cut, its like the power goes out, and comes back on. Machine restarts goes to the start screen, and I have to restart the cut.

Never seen this one before. Not sure if it’s a time issue, a heat issue, a short, no clue. Didn’t do it on my last cut, did it the cut before, did it this cut.

Any ideas on why the computer would just power cycle?
What should I check?