It's not just the phone app but v3 as well. However, since their RD will be high, it shouldn't really have much if an impact as they will quickly drop to where they should be or rise up as the case may be.
Based on the help article, I guess you are right. I was remembering incorrectly. However, based on those game results, the site may have implemented someting similar to combat rating manipulation.

Thanks for links. Btw, if each side has made a move, the result stands at move 2, even aborts. (same as resign). 1 exception is "time outs" where it stated 4 moves.
Confirms my thought there is nothing to gain being a 1900 player (online) in playing a new 1800 player and everything to lose points wise. Back when all players started at 1200 and worked their way up made more sense. Now new signups via a phone app. can start at 1800. A mistake imo. by chess.com. A vast majority have not a clue to their strength.