URL under link change the variable and doesn't work

Hi again crew!

I'm working with this distribution:
- CentOS 7.5
- PHP 5.6
- MariaDB 5.5: InnoDB
- Osticket 1.9.9
- Language Pack: Spanish
- No Mods.

I have a issue like this:
http://osticket.com/forum/discussion/77348/resolved-1-9-link-in-customer-email-not-working

I have a predefined answer with a little text and a link

Click <strong><a href="http://surveys.speedtelematics.com/index.php/381997/newtest/Y?S1H1=%%7Bticket.number%7D&amp;S1H2=%%7Bticket.email%7D&amp;lang=es">HERE</a></strong>.<br>
<br>

When I save the url in href tag, this changes. The correct url should be this:
http://surveys.speedtelematics.com/index.php/381997/newtest/Y?S1H1=%{ticket.number}&amp;S1H2=%{ticket.email}&amp;lang=es<br>

So, the link doesn't work.

I saw that this issue was fixed and I test that my class.thread.php is the right version.

How can i solve this?

Thanks in advance.