Telegram not updating link preview from github

Question

I changed my profile picture on github quite some time ago, but whenever I share a link to any of my repositories via telegram, it still displays old profile pic. If I share it via skype, correct image is displayed.

I tried to use webpage bot and /updatepreview command, it says that "Link previews was updated successfully. Check them out!" but the image is still the same (not updated)!

How can I make telegram clean cache for links from my github account?

Answer 1

I used webpagebot like this answer from another thread to fix my GitHub avatar and it is working for me.

After giving the URL to the bot, I had to push Update with Content.