ok I found your payment and canceled the hodl invoice so you should have your money back (technically it never actually left your wallet)

not sure what went wrong though so I am investigating

I can tell this immediately: the payment was not in your "pending record", and notifications only go out when the database sees that you have something in your pending record

I don't know why the software detected your payment but did not enter it into your pending record (or maybe it did but somehow the record got deleted)