(MAJOR) problem with Mouse 4-5 buttons

Hi Still it has been so long and we have no Hotfix for this broken update which made so many of us UNABLE to use MOUSE 4 & MOUSE 5 buttons, which people have used for years which it comes to establishing plays on the rift. PLEASE fix this annoying bug everytime I die due to me being tabbed out when this bug occurs i get closer and closer to not wanting to play as I just INTED due to a riot bug. Comment if you also have this problem so riot can see how big this.
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