Steps to reproduce:

1. Create  a project
2. Add a cube (or any other object) in the "Hierarchy" window
3. Go to the "Inspector" window
4. Find the "Tag" section
5. Expand the dropdown and select "Add Tag..."
6. Click ""
7. Enter long tag name (example added in the "Comments" section)
8. Verify that the created tag becomes visible in the "Tags" list
9. Click "" the same and enter the same tag name, and click "Save"
10. Verify that you should get a validation message for the same title, and the "Save" button should be displayed below.

Actual results: "Save" button is not visible

Expected results: "Save" button should be visible

Reproducible with versions: 6000.1.11f1, 6000.2.0b9, 6000.3.0a1

Not reproducible with versions: 6000.0.50f1 as this one new feature is not added.

Can’t test with versions: 

Tested on (OS): M1 Max - Sequoia 15.5