The exotic capability may have been a countermeasure intended to blind American early warning satellites from detecting a first strike launch.
This is the first original source. The second source is the magazine Fortean Times February 2019. Very dubious sources, especially the second. If this is a joke, why such crazy nonsense: the Dome of Light over Kamchatka, the late memories of the pilot, the publication in the Los Angeles Times and more? I am interested in the opinion of your experts.