Tvheadend

I am trying to use IPTV service, which use html basic authorization method for login. But logins are email addresses. In VLC (or even the browser) I can use %40 substitude for @ character. Example:

http://some%40email.com@provider.com/playlist

This syntax is correctly translated by browser or VLC and in packet capture I can see in credentials some@email.com.

But when I do the same in tvheadend, in capture credentials are not changed and some%40email.com is sended for the authorization. Which is of course not working.

Is it possible to be corrected?

Iam not attaching captures, because it contains valid usernames and passwords, I hope explain is clear enought.