Siri not providing spoken responses on iPhone 17 Pro after iOS 27.2.1 update

Updated my iPhone 17 Pro to iOS27.2.1 and Siri no longer provides spoken responses to questions or requests. I have "Prefer Spoken Responses" checked, phone not on silent and followed several other recs I found online, but still no spoken response. The screen gently flashes in what appears to be an acknowledgement of my voice, but responses are written so I need to have my phone in hand to use Siri.

Today (Nov 10) I installed a security update thinking maybe Apple was fixing this glitch.

Any thoughts?