please provide a proof. if this is the case, then telegram is not to be trusted. but it needs to be proven. otherwise a lot of people trust their business and personal data to telegram.
Was this on a desktop? I'd think it's far more likely malware or a browser extension is hijacking your clipboard
Do you have a proof?
What even is this claim? Telegram is compromised? Some telegram bot/group got compromised?
Is there any proof of the global telegram issue related to amex links? Sounds like BS