Sorry, this is me being a “smart-***” (so don’t take this too seriously), so if I guess “It is because the solar panels of the international space station are being affected by cosmic radiation and that limits the communication here on ground with the rest of the team” does that mean my guess has as much merit as yours since I derived it from the same data elements of 65% still haven’t upgraded?
No, it still is a completely wild guess with nothing backing it. 