OS: Windows 10 - 64bit
To reproduce:
1. Sort items by Name
2. Switch to Details view
3. Drag any file(s) in the middle of the list, to make a custom order
4. You can double click the parent folder to go up and then go back to previous folder
5. Click the Sort by sub-button ([v])
Actual behaviour (bug): There's a sign next to the Name, so it looks the items are sorted by name, but custom sorting is active (correctly in the Sort by context menu).

Expected behaviour: Sign next to the Name should be removed if custom order is activated.