Hello Sebastien,
Thank you for bringing this issue to our attention. We truly appreciate your vigilance and support in helping us improve our service. We will fix this issue in next version update meanwhile, you can add below custom CSS code in Appearance > Customize > Additional CSS to show the telegram logo.
.social-profiles ul li a[href*="t.me"]:before {
content: "\f2c6";
}
If you have any further questions or additional information to share, please don’t hesitate to reach out.
Thank you!
.
.