Steps in test are lost after editing and updating in List View

Steps to reproduce:

1. Created a Manual Test with Test Steps
2. Go to Issue Search window and search for the test in List View
3. Choose the Test row to click "Action button" -> "Edit"
4. In "Test Details" tab, the "Steps" are missing;
5. Update Issue details
6. Back to Test and the Test Steps are gone.
   Illustrated on this gif:
   

Console Error after step 3.: