Be more defensive when checking cached downloads.
Attempt to fix #1172 (closed), but couldn't reproduce it. So instead put a defensive check in place and then documented why it is there.
Edited by username-removed-25042
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Attempt to fix #1172 (closed), but couldn't reproduce it. So instead put a defensive check in place and then documented why it is there.