Disconnecting in ranked games

I have randomly been disconnecting in ranked games. The game would show the disconnection screen and I would alt-tab out to see if my connection is still there (and obviously it is still connected). The timer would then run out and games would then count as losses when I have to "eject" the opponent (although strangely it says that I have won too).

I wonder if this is a common issue and does anybody face this too? Thanks.

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