Automated system does not recognize keypad entry from iPhone 15, ios 18.3.2

When making phone calls which are answered by an automated systems (i.e., conference call bridges, support desks, etc.), responses to prompts (i.e., "Press 1", "Press 2") by pressing the appropriate number on the keypad are not recognized by the automated system. I was trying to reach a doctor's office today with an urgent call. Had to give up on the iphone and switch to Google Voice on the computer. Very frustrating and potentially dangerous.