execute command doesn't work well in npc with @initiator for example :

/execute as @initiator if score @s Money = @a [tag=test] Money run playsound beacon.power @initiator

However you can do only

/execute as @initiator run playsound beacon.power @s

That's really annoying me and don't let me do what I want and I'm sorry if you found my English bad 🌷