Was s3, now b4 after one game?
I played 14 games of ranked before the ranked fix. I had achieved s3 on this account after placements, played a few more games (about 4) and didn't play again. Once the fix was applied to live servers I played the extra placement game. I went from s3 the day before to b4. Normally the system takes only 10 games for placements to determine your rank.
However after the latest patch everyone who had already placed in a division need to play one more game to determine their rank again. But this time instead its counting all your ranked games this preseason into your placements instead of the first 10. For example I played 14 games of ranked, not sure how well I did, can't quite remember however I can tell you I checked my profile and it saw my rank of 14/10 placement games played. After one more placement game I had 15/10 games played. But because the system is using an average wins to determine your rank, the more games of placements you do the better the average, right?
I think a potential fix for this is for others affected from this (and myself) should have their rank completely reset and to play all 10 placements again, because as some people do I care about my rank even though its a bad rank (all things considered). Without this fix my preseason and probably my season 7 ranked experience is probably going to be worse then it had been previously and could even turn me away from the game entirely.