Hello,
When playing last week I noticed a black line in the middle of my monitor while playing (I'm on PC) It doesn't show up on anything else just when playing BG3. I noticed today, when I changed my desktops display resolution from 3840 x 2160 to match my game resolution of 2560 x1440 the black line disappeared. Not sure if anyone else has had this problem but thought I would post anyway.