When changing public key for re-flashing a demo device, for example, a new auth request is sent for the device. Because the device is already accepted with its old key, it will not show in "Pending" as it will keep its "accepted" status until the user acts on it - and it wouldn't make sense to show the device in both "accepted" and "pending" lists. So the user must look for the device in the "accepted devices" list, then click it to expand and adjust auth status for the new auth set.
Make this easier for the user by highlighting devices that have a new pending auth set.
Produce and test a design to add some indication that the device has a pending auth set request that is newer than its current accepted auth set request.