The following features do not work from the Drawer UI component:

• Mark as read from a specific event
• Mark selected as read (one to multiple events)
• Mark selected as unread

In all of these cases, the network tab from the browser shows an HTTP 415 error. The request sent by the frontend to the backend appears to have no body, which is likely the cause of the 415. The body is required to identify which event(s) should be updated and which status (read/unread) should be set.