currentProject() function does not work under Filter issue scope (IQL) for Insight custom field

Issue Summary

When attempting to configure the Filter issue scope (IQL) for an Insight custom field, the object picker returns "No options"

Steps to Reproduce

1. Add "Project" attribute to an Insight Object (String)
2. Update the attribute with the name of a project
3. At insight custom field configuration, configure Filter issue scope (IQL) with the following

   "Project" = currentProject()

Expected Results

When using the object picker on an issue, the list of objects should be filtered based on the issue's project.

Same as when "hardcoding" the project name into the Filter issue scope (IQL), i.e. 

"Project" = "Project name"

Actual Results

The object picker displays "No options"

Workaround

No workaround available, the following option also returns "No options" 

"Project" = ${pid.label}