Hello Smallee,
Typically a 2D sound (UI sound) does not pause when the game stops or is called to pause. This is because most 2D sounds do not contain audio components which contain a toggle for this very feature, as you have discovered.
Are you referring to the ‘Real-Time’ audio within the Editor, or are you referring to the sound when pressing PIE (play in editor)?
Also, if you have unchecked ‘Auto-Activate’ then simply calling the Audio component to play using the ‘Play’ node is going to call the sound to play, therefore you do not need the ‘Activate’ node.
Let me know if you have further questions or need additional assistance.
Thank you,