Product Category Selection Not Displayed After Saving

Summary

When a product is assigned to a category using the Category tab and the product is saved, the assigned category is no longer shown as selected when the product is reopened.

Steps to Reproduce

1. For a product (or any where an item can be categorized). Navigate to CMS → Category.

2. Open the category structure and select a category.

3. Save the product (or item).

4. Click on a link in the left side menu. Reopen/click on product item.

5. Return to the Category tab.

Expected Result

The item category should still be displayed as selected, indicating that the product is assigned to that category.

Actual Result

The item category is not shown as selected.

Issue

When the item category needs to be edited, there is no indication which category the item falls under.