So my entire team disconnected during a ranked game

So yeah, at around min 3:30 my whole team disconnected (including me). Then my jungler couldn't reconnect and we played a ranked game 4v5 because of a bug? I don't know what it is or how to say it? Is it a bug? idk doesn't matter but what caught my attention is that the enemy team didn't disconnect. It seems too coincidental for 5 people with bad internet to get in a ranked game together. Lost my promos because of it but i"m not really mad i just want to know if this is a bug and if it is why did only my team disconnect. Enemy team basically got a free win because of this, they got 1 kill and at least 10 farm each plus a 5v4 game
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