WiFi gone?

Hey there, I rooted my S6 with CF before and I also installed TWRP. After I flashed the Game tools and Galaxy labs port from the S7, my WiFi didnt work. I flashed the stock rom with odin and everything went fine. But when I tried to root my S6 again with the same CF, my WiFi broke again. After flashing to stock with odin AGAIN, everything was fine again. Am I doing something wrong? Please help me, I really want to have/keep root. Thanks in advance!

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