Retrieving voicemail with keypad

I have an iPhone 14 plus, software is updated to latest version of iOS 17. When I try to listen to my voicemail using my keypad password the recording says “ you have no new messages “ when I actually have new messages because the new message icon shows up, I get the visual notification of missed call w/voicemail & I can see them listed as usual & can read them as usual. So why is it saying I have no new messages when dialing my passcode???? Thx