Game still in progress.

Does anyone keep getting this stupid bug again and again and again? I have been demoted, lost 4 ranked games [one at 99 lp] and lost tons of lp because of this. Restarting PC takes time and its always been remade after i restart. I have no idea what to do. I feel like with all these bugs the last two patches are one of the worst patches riot released. If anyone knows how to fix it, i'll appreciate the help.
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