The bug:

An item frame with an item inside plays the minecraft:entity.item_frame.add_item sound everytime a /data (merge/modify) entity command is applied.

How to replicate:

1. Place an item frame in the world and put an item inside
2. Place a command block and paste this command: {{execute as @e[type=minecraft:item_frame] run data merge entity @s {Glowing:0b}
   }}

1. Set the command block to repeating and always active