Custom ordering app curbside audible failing

We have a custom ordering app using Square’s Orders API.
When a curbside customer taps “I’m Here,” our app updates the fulfillment using buyer_arrived_at.

The Square POS correctly shows the customer-arrived popup, so the arrival update is being received.

However, the POS does not play the audible curbside-arrival chime for these API-originated updates.

On the same POS/device/location, Square Online/Cash App’s native “I’m Here” flow produces both the visual popup and audible chime.

We have confirmed:

  • curbside arrival notifications are enabled
  • notification sound is enabled
  • push notifications are enabled
  • Square POS was restarted and retested

Is buyer_arrived_at via the Orders API expected to trigger the same audible arrival notification as Square Online/Cash App? If so, is there another field/event required, or is this a known limitation/regression for API-originated curbside arrivals?