Why is a strange url displayed for an https site?

Question

Digital certificates

Good afternoon!
I purchased a domain on reg.ru and an SSL certificate came to it, I configured everything and https works, BUT
Sometimes in some browsers in the url line and always if you poke on the lock to the left of the url line instead of the site name, a hash of the form https://xm is displayed --80urokdflsif.com
Please tell me why this is happening and how it can be fixed?

Answer 1

It is worth reading about Punycode and RFC3492 , I think there will be fewer questions about this)