Issue with Matching UTF-8 Anchor Text in URIDetail plugin

Hello,

I am experiencing difficulties creating a rule to match UTF-8 anchor text
using the plugin, and I suspect there might be a bug related to UTF-8
matching.

For example, I attempted to use the following rule:

uri_detail UNICODE_LINK_TEXT text =~
/\\x{E0}\\x{B8}\\x{97}\\x{E0}\\x{B8}\\x{B1}\\x{E0}\\x{B8}\\x{99}\\x{E0}\\x{B8}\\x{97}\\x{E0}\\x{B8}\\x{B5}/

The anchor text
is \x{E0}\x{B8}\x{95}\x{E0}\x{B9}\x{88}\x{E0}\x{B8}\x{AD}\x{E0}\x{B8}\x{AD}\x{E0}\x{B8}\x{B2}\x{E0}\x{B8}\x{A2}\x{E0}\x{B8}\x{B8}\x{E0}\x{B8}\x{97}\x{E0}\x{B8}\x{B1}\x{E0}\x{B8}\x{99}\x{E0}\x{B8}\x{97}\x{E0}\x{B8}\x{B5}

Could you please review this issue and advise on any potential fixes or
workarounds?

For additional context, you can view the full details of email here:
https://pastebin.com/pAKDdY55

Thank you for your assistance.
Jimmy