My users regularly write about the "infinite loading" issue.
There is an inline button with a link https://t.me/<bot_username>
User clicks on it and the Telegram client freezes with a spinning loading wheel (look at the attached video).
I used to think that this was due to Telegram blocking, but they were removed for a long time, even problem users come across from different countries. It seems that the Telegram client is not correctly requests DNS servers and cannot recognize the link.
I found a workaround for users who got thisbug. They should open the same t.me link in their browser. After that, the same inline buttons in the client start working as expected.
P.S.: I can't reproduce it, but too many users asks me every day about this bug.
Telegram Android 7.4.2 (22277)