Coming across a strange issue - not sure if anyone else has come across something similar.
We have a form with a custom HTML field which includes a hyperlink to a Web Client search URL, which is supplied to the form from a workflow.
The link shows the URL it's navigating to, with the proper search syntax. When the link is clicked, it will load into the web client (as expected), however it loads in the syntax with the \ for the repository location backwards (i.e. "\Parks & Recreation\Facilities\Playgrounds" will return as "/Parks & Recreation/Facilities/Playgrounds"), so it returns no results.
Screenshot attached of the example - notice the slashes in the query in the wrong direction, but in the correct direction on the hyper link.