The Bug:
The "minecraft:ui.button.click" sound isn't played when clicking on the "Join Server" button in the multiplayer menu.
Steps to Reproduce:
Navigate to the multiplayer menu.
Select a server, hit the "Join Server" button, and listen closely as you do this.
Take note as to whether or not the "minecraft:ui.button.click" sound is played when clicking on the "Join Server" button in the multiplayer menu.
Observed Behavior:
The "minecraft:ui.button.click" sound isn't played.
Expected Behavior:
The "minecraft:ui.button.click" sound would be played.
Can confirm.