I get these as well - with any difficult coding or even SRE problem or any sort of deep logical problem that I find myself working on until the last moment before I go to bed.

I find that doing something else for about an hour before going to sleep helps with this almost 100% of the time. It could be listening to music, watching TV, reading, playing with my kid, almost anything. But giving my head a full hour to rest from a deep problem helps me sleep without ending up in some logical nightmare that only some construct from my problem could resolve (and tends to make worse)