Telegram keeps a tapped button in its loading state until the callback is
answered, and three paths dropped the tap without answering: a payload that
matched no case in the email-scoped switch, one that matched nothing in the
switch that follows it, and a button whose hash had aged out of the 20-minute
storage, which replied with a chat message only.
All three answer now. The email-scoped switch is reached only by an admin's
payload carrying arguments, and today an unknown action there falls out of the
switch into a return that tells the operator nothing.
The expired-hash path keeps the chat message as well, because
sendCallbackAnswerTgBot is a single unretried call while SendMsgToTgbot retries
connection errors, and after a panel restart that notice is the only
explanation the admin gets.
BlindMaster24