EOS R6 and 24-70mm Sigma: Blurry to right of photo

[RandiG]

Can anyone give me some answers as to why this keeps happening? The right of the photo, everyone gets more blurry and out of focus, as to everyone on the left stays in focus the whole time. I am shooting with a R6 and my lens that I use is a 24-70mm sigma. seems to happen more when I'm at the 24mm focal length. Please see attached photo for reference

[kvbarkley]

Possible de-centering. You can try the newspaper or brickwall test.