Screen bug

My main screen have two black things on the sides, when i choose my other monitor it doesnt, but when i tab out and get back in i got to do the same setting over and over again.
https://medal.tv/games/valorant/clips/kKB1fLkmfU1aYwCU_?invite=cr-MSxVMFUsMTkxMTUzNTE

Medal - 🔴 Record & share unforgettable gaming moments. HD w/ no lag.layyo

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