Add-on notifications show a letter placeholder ("A") instead of the add-on icon

Developer General
1

Hi all,

We’re using the new Create Add-on Notifications endpoint (POST /api_1.0/notification.json). Delivery and destination_url work well, but in the web notification panel every notification shows a blue letter tile (“A”) instead of our add-on icon.

The request has no icon field. Our manifest iconURL is a valid 512x512 PNG, and our action icons display fine on the job card.

1. Where does the notification icon come from, and is there a portal setting we’re missing?
2. Is it cached from when the add-on was first registered?

Thanks!