Background contents are incorrectly hidden when clicking on the "Add Realm" button in the realms menu

The Bug:

Background contents are incorrectly hidden when clicking on the "Add Realm" button in the realms menu.

Steps to Reproduce:

1. Navigate to the realms menu.
2. Click on the "Add Realm" button and observe in the Minecraft Realms logo is partly hidden.
3. Take note as to whether or not background contents are incorrectly hidden when clicking on the "Add Realm" button in the realms menu.

Observed Behavior:

Background contents are incorrectly hidden.

Expected Behavior:

Background contents would be correctly hidden.