sendAudio api doesn't set the title, performer, thumbnail and other

[mnickmagham]

when using the sendAudio api in TelegramBot.SendAudioOptions it only sets th caption and other things doesnt work. I read somewhere that it happens only when you give it a url instead of a file path.

[Enuriru]

I guess that's how Telegram servers process the file. When they download it using url, they ignore any metadata.
However, even when I pass the file as Buffer thumbnail never worked for me. No idea why.