Epic Link on the issue navigator is not sorted base on the Epic key

Steps to produce:

1. Create GH board with multiple Epics.
2. Add as many issues to these Epics.
3. Go to the issue navigator, add the Epic Link column to the issue navigator and sort the issues base on the Epic Link.

Actual Results
Issues are randomly sorted whereby there is no an exact pattern to follow (nor the Epic key or link Id from the DB)

Expect Results
Once the used order the issues base on the Epic Link, issues should be sorted base on the Epic Key.