I have such a problem, I recently launched an advertisement from a link to a telegram bot in manychat, but yesterday's contacts were not added (although I see that the bot sent them a starting message, today I look, there are contacts for this day, and they still received the message, well, the fact that the external request to facebook pixel either did not happen or something else, because a few days ago I tested, everything was fine, everything went as it should, when I launched the advertisement, none of the yesterday's requests were sent, and today only 1-2 of several
what could be the problem?