Tile Map background color is not changed with color picker in Editor Preferences

When the background color for the tile map editor is changed it does not change.

1. Open any project in the editor
2. Create a Tile Map and open it to observe background color
3. Close Tile Map
4. Go to Editor Preferences> Content Editors>Tile Map Editor>Default Background color
5. Change the color
6. Reopen Tile Map

Expected: When the Tile map is opened it will have the background changed to the color the user had chosen.
Result: No changes made to background despite user changes in the the editor preferences.