Tip screen on Cashier POS when using a CDS tip % are disabled for the Cashier

We have had a situation where a Cashier would quickly tap a large % on the Cashier side when the Tip screen appears and then quickly tapping the CONTINUE button so the total is sent to the PAX device. The cardholder does not see the added tip and simple taps/inserts their card.  The ticket is paid for with the unknown tip and customers are advising later that day and next day they did not tip that amount.