there's been a lot of complaints from a lot of users in the forums here, but i'm now starting to see complaints on external sites...
Possible cause for timeouts in Live games?
Our dev team is looking in this and they asked if you could continue to report the 502 and include a screenshot that looks like this:

Thanks for you help!
@gambit-man Do you mean complaints of 502s? If so, I'd like to try to find and contact those people if you could point in the right direction!
no, of disconnects, although the complainers don't usually know that's what's happened.
i also so one last night externally where they only got a draw out of a completely won ending. It may have been a bug or a disconnect, but there is a similar case (different positions) in chess.com forums today where a checkmate was delivered but was only awarded a draw.
I see this from time-to-time when making moves in Online/Daily chess games. It does not affect me much because I gave up playing in Live games long ago, but this may be part of the reason so many are upset with Timeout losses in Blitz & Bullet games.