You're correct.
I found a couple links I had, and one source of particular interest, that in whole, only adds to the speculative nature of what is claimed in some of the more 'fantastic' claims of cosmonauts lost in space.
First, the Wayback Machine uncovers The Lost Cosmonauts. website specifically about the Judica-Cordiglia brothers radio tracking claims of space flights in the early space race.
Interestingly, James Oberg presents extensive research
that none of the more sensational Judica-Cordiglia claims of secret discoveries were confirmed
I would urge one interested in this subject to visit JamesOberg.com and Space Age Myths and Legends. Uncovering Soviet Disasters.
Again, another link that popped up, of questionable validity, is Dead Cosmonauts. I post only for names to be used for search prompts, should any search reveal corroborating reputable sources.
As in any web research the information is only as good as its referenced sources. Some stories are true, some are myths, some are exaggerations, and some are simply made up.
Apologies to Mr. Oberg should linking his research without permission is overstepping proper etiquette or for my lack of a thorough examination to provide the most pertinent direct links. Apologies to everyone for the uncalled for emotional outburst, something I need much better control of.

