Yeah, the looping is the symptom and not the cause. Perhaps his brain refused to or couldn't parse it because it might create certain negative mental consequences.
I used to dream of being chased by someone/thing, and could do the most impossible things to evade, jumping like a gazelle, flying over buildings etc. Sometimes I would be lucid part way through and control the direction of the dream, but didn't know what initiated the escape narrative.
In my early twenties, I told a friend of mine and he said "Why don't you stop and turn around?".
Some short time later, the dream narrative recurs and I'm running in complete fear, and as I'm crossing over a precarious rope bridge, I stopped. My friend irl had asked in our prior conversation if I could see in colour, see my hands, and feet as well. I looked down, and said "Yes, I can see my feet, and, yes, I can see my hands, and, yes, I see in colour." I slowly turned around with this electric fear and there was no one there, only myself. I surmised that was who I had been running from for the previous few years.
I was in denial about being deaf and other stuff. It was avoided by my mother as a talking subject, so I thought it was something that was essentially forbidden to think or talk about. It was in her body language. She is a perfectionist and I wasn't 'perfect'. My stepfather took me to get my first hearing aid at seven years old, when it was realized I was deaf. She couldn't face it. That rubbed off on me. The dreams stopped after that.