Search 'cite' within comments - problems

[NikNak]

Hi all 

I am trying to search for text with a comment including the 'cite' field.

This code works to search within the main text of the comment:
$items = FieldtypeComments::findComments("comments", "data~=$q");

This code works to search an exact match in the cite field:
$items = FieldtypeComments::findComments("comments", "data=$q");

But this code will not work to search within the cite field:
$items = FieldtypeComments::findComments("comments", "data~=$q");

Currently I can only get a matching search for 'Joe Bloggs' but not 'Joe' or 'Bloggs'.

I have also used another method using $fields->get('comments') - but have the same issue.

Any thoughts? Have I found a bug?
I was also wondering how you would combine searching within more than one field in the comments.

Processwire:  3.0.159 dev.   comments 1.0.8  (Latest version from dev branch at time of posting)

Many thanks
Nik