I agree with the other posters. Also, the board may bend away or
toward the fence, while cutting, by virtue of stresses in the board
being released and/or moisture release, contributing the board bending
as it's cut, especially with air dried lumber.
You say you have this problem cutting a panel. A plywood panel? A
regular board as being the "panel"? Identify your "panel",
Do you have this problem with all your wood cutting?