Editing a sign in single player no longer pauses the game

Unlike in previous versions, editing a sign doesn't pause the game in the background in single player.

Steps to Reproduce:

• Open (or create) a single player world

• Make the setup as shown in the video attachments

• While facing the setup, press escape

  • Piston should freeze, indicating the game has paused

• Press escape again or click "Back to Game" button to return to game

• While still facing the setup, place a sign

• Take note as to whether the piston freezes, indicating if the game paused or not 

  • ❌ Observed: game resumes in background

  • ✔ Expected: game would pause in background