iOS 17 Image Descriptions are quite good, but audio descriptions don't seem to work on non-Pro devices, even though text descriptions are being shown on the scr

iOS 17 Image Descriptions are quite good, but audio descriptions don't seem to work on non-Pro devices, even though text descriptions are being shown on the screen and the audio menu is present and activated. Is that a bug? Even on Pro devices, audio image descriptions stop working after a few cycles of switching between Image Magnifier and apps/home. This can be fixed by restarting the app and disabling/enabling audio image descriptions, but that breaks the use case when an iPhone is dedicated to running only Image Magnifier + audio descriptions, via remote MDM with no way for the local blind user to restart the app. On-device iOS image descriptions could be improved if the user could help train the local image recognition by annotating photos or videos with text descriptions. For a blind person, this would enable locally-specific audio descriptions like "bedroom door", "kitchen fridge" or specific food dishes. Are there other iOS or Android AR apps which offer audio descriptions of live video from the camera?