Ok so I did some testing and wasn't able to replicate this issue. Made a new save file for myself and both my first and second scores saved to the leaderboard. Restarted the game and played two more, and both of those scores saved as well.
That all being said, I *think* when playing I got a 127k score which I don't see on my scoreboard. However, I'm not 100% sure because I wasn't keeping super close track of what my scores were until after this happened, and I do see 4 unique scores on my scoreboard, which is the number of games I played. So it's possible that the issue isn't that scores aren't being saved, but that they are being saved incorrectly in some cases. If your 150k score isn't on your score board, it may have saved as a lower score. I'll give this a closer look soon to see if something is going awry.
I did also notice a few other bugs: one being hands are sorted in reverse now, whoops. Second being the second game you play after the tutorial will be a multiplayer game even if you don't have two players.
I'm going to wait a bit before making a patch to fix these to see if more bugs come in.