Cannot select Y coordinate for Structure Block when using a controller

When I tried to save a massive build I made, I was unable to manipulate or change the Y coordinate within the Structure Block. It was working fine in earlier versions and every video covering the Structure Block in Bedrock Edition showed that changing the Y value is possible.

Steps to Reproduce:

1. Use a controller
2. Place and open a Structure Block
3. Try to select the Y coordinate

Observed Results:
You are unable to select the Y coordinate.

Expected Results:
You should be able to.