Filter Results gadget: when using a custom label field the value None appears along with other Label values. None should not be considered as a value and must not be visible in Gadget column. The issues that have an empty label field are not listed. With other field-types (custom and built in) a "None"-entry is added, if any issue does not contain a value.

How to Replicate

• Create a team managed project
• Create a custom field of type Label on any issue type
• Create a Dashboard and add gadget Filter Results
  
• None appears as Label field value