I won my ranked game but it counted as if I was a leaver??

Basically I got a connection issue during the summoning and when I got back the game was around the 3minute mark but I was still able to play just fine and actually won even saying so in my match history HOWEVER I did not win any kind of LP, got graded D- as if I was AFK and it counts as a loss in my rank game but I was NOT afk and actually did pretty well.

Normally I would really not care but it was my first placements game wich obviously have a big impact.

Just wondering if there's any chance of fixing this? Its honestly quite annoying.

Thanks for reading!