new issue navigator error with custom date picker field

With the new issue navigator, using the In Range search option with custom Date Picker fields causes a Server Error.

Steps to Reproduce:

1. Create a new custom field > date picker
2. Head over to the Issue Navigator
3. Click 'More Criteria' and select the new date picker field
4. Choose the In Range option
   • Fill in both fields
5. Click 'Update'
6. Error

Note: system date fields work fine. (aka Created Date, Resolution Date, etc)

This was tested on the 5.2 release with a brand new instance. No plugins/customisations.