By no means an expert but I think most RUAF comms on hf voice are simplex, not uncommon at all to not be able to hear whoever the heard station is talking to. RUAF flights have to relay comms for other flights all the time, from what I've heard. CIS hf cw comms are often duplex, however.
Speaking of RUAF voice comms, if you live near their usual bomber paths near NATO countries, they sometimes like to use the local v/uhf air interdiction freq, just to let the qra flight as well as the rest of the audience know they're listening in too.