There is a single source of this idiotic story on Komarov: the scandalous book by two American journalists. Nobody else mentions it.
The book was debunked by the actual American space historians, traces of what you see in the comments to the first NPR story and in the second one, which is a retraction of the first one.
The journalists were shown as literal liars — they invented things that's never happened. The book is not a source of any information, even the parts of it that were not "disproved". The book was disproved. Which does not say anything about Komarov's story other then you need some other source for it. Which does not exist so far, because the only source of the story is this fabrication.
As for the actual story of the flight, Komarov's wife recalls (without a KGB gun at her temple) that Komarov was excited and cheerful about the mission and even refused to drink milk from a refrigerator so that there was no risk of catching a cold. He expressed no negative thoughts, and whatever concerns whoever had about the mission, it was not shared with Komarov.
Neither he nor telemetry reported anything until the communications blackout, and there no reports from him after that anymore. He's crashed because the parachute did not deploy properly, and he's lost consciousness or life before that due to violent rotation, retro-engines caught on fire at the moment of impact, his body burned. Cosmonauts were brought to the morgue to see him, his body was cremated, the vase was on display at the funeral.
And that's it. If you have any other information, please post the source. There are none. The money-generating device debunked by the NPR is not a source. And there is nothing else. Although tons of American and Russian space historians are interested in this mission just like in any other and researched it.
It's a good idea to first learn who Kamanin and Chertok were (one of them is in the picture, actually), then read their memoirs published well after the Soviet Union has dissolved, and then talk about space history.