The filter option not working properly in the Test Executions along with the covering option.

Description
The filter option not working properly on Test Executions along with the covering option.

Pre-conditions
Create a custom field Select List (Single Choice) and add it to the Test screen

Ex: Custom_Priority: a{}

How to reproduce

1. Create Tests and provide the value for the custom field.
2. Create a Story and Add Tests 
3. Create Test Executions and add the same Tests. 
4. Click on the filter option
5. Select the Coverage option
6. Select the Custom_Priority
   

Actual result/Attachments

Filtering the Tests only for the ** Coverage value mentioned in the filter section
**

Expected result

The filter should be work properly for all the options mentioned.

Version