No braincells, just randomness

Anytime we're on Earth waiting for the training salles to be repaired, he wants to go to the same goddamn Waffle House and get breakfast food. We're not big eaters (us Powers all have very tiny stomachs), so we didn't used to care. We would just drink coffee and read books or converse while he enjoyed his food. But that became impossible once he and this one machine cook started chirping at each other every time we went there. Our mentor complained about his eggs one time, because he likes them a little runny and they were served hard. The machine cook responded by giving him scrambled eggs. When he brought it up again the machine cook served him two hardboiled eggs. I think it was just part of the machine cook's schtick, and it was kind of funny tbh, but my mentor wasn't able to laugh it off. When we left he was in kind of a bad mood, but we didn't really talk about it (the sparring session afterwards was more... gruelling than usual though).

The next week we were out getting some shopping done (Heaven doesn't have a DIY store and we ran out of nails for training salles repairs), and he wanted to go to Waffle House again. We suggested that we try out a different place, or at least a different Waffle House location, but he only wanted the same Waffle House. We went in and sat down, and once again the same machine cook served his eggs wrong. Our mentor sort of snapped at it that he wasn't interested in messing around and just wanted the correct eggs. The machine cook then served him a piece of toast with a hole cut out in the middle with a fried egg in it. Our mentor got really mad and threw the egg toast at the machine cook, which made the machine cook come around from behind the bar and throw it back at him. They ended up sort of wrestling/fighting until our mentor was like "this is bullshit" and walked out. Nobody got hurt, but the few other people in there were watching and laughing a bit.

This is the crazy part: out mentor keeps going back and ordering eggs and getting into fistfights with the same machine cook. It's almost a ritual at this point. Our mentor orders runny eggs, the machine cooks serves him some other version of eggs, and then they beat the shit out of each other. We quit going with him after the fifth fight, but he kept going by himself. They're like Peter and the Giant Chicken from that human show called Family Guy, it's the weirdest thing. They've physically fought like 10 or 12 times over this.

We've tried to talk to him about it a few times, but he keeps saying it's a matter of principle. We told him to talk to the manager or something like that, but he just waves us off. Apparently that machine cook hasn't yet made him the correct runny eggs, but it's like it spends the week learning new ways of preparing eggs to piss our mentor off.

The thing is, our mentor is getting promoted this century. He's accepted a job as the Judge of Hell and we will be taking up protection of Heaven in his absence, so he won't have time or excuses to visit his sworn enemy Waffle House robot. He hasn't really been out since being promoted but it wouldn't surprise me if that's the first place he goes when he's allowed to have vacation (if ever). But our main worry is this strange vindictive side of him we've never seen before that leads him to fight the same machine every week. The violence itself isn't really an issue, but the obsession over it almost bothers us more.

Should we be worried that this side of him will come up later after spending time overseeing Hell? How do we get him to open up about this? Is this type of obsession a choice, or is it indicative of something deeper?