If there are smaller changes that are relevant to the existing feature that is being developed (change of color, enlarged image, moving buttons), these should fall in line with the current sprint.
If there are new feature requests or significant functionality changes, these may need to be quoted in addition.
The Client has paid for a certain amount of time, which was quoted for according to the outlined scope.
Changes to this will extend the scope and cost, and it is generally advisable to keep major or breaking changes for the next version or sprint.
