The Bug:
Invisible elements can be selected and interacted with in the realms menu when you're not currently a member of any realm.
Steps to Reproduce:
Navigate to the realms menu.
Hit the TAB key and then press the SPACE key and observe if you're returned to the main menu and a browser tab is opened.
Take note as to whether or not invisible elements can be selected and interacted with in the realms menu when you're not currently a member of any realm.
Observed Behavior:
Invisible elements can be selected and interacted with.
Expected Behavior:
Invisible elements would not be able to be selected and interacted with.
This is actually a duplicate of MC-263245. What's happening here is that buttons within the "Add Realm" interface don't render, but still function correctly.