I don’t want this function.
Is there a way not to use this function?
I want Deactivation
The animation is a bit small to see well, but I’m going to guess you have a lasso-style selection brush active.
Hold down Shift + Alt while you click on the Brush selector button to change the active selection brush back to the default rectangular selection marquee or a non lasso-style selection brush.
Not press Alt while using a lasso style selection brush.
Assign Tool> Geometry > Crease > UnCrease All to a hotkey to quickly eliminate the creasing.