Can not play a sound to a unit when mission is run on a server

[flasper]

I have created a mission where I am trying to play sounds to individual units and the sounds play when I run the mission in singleplayer but none of them play when the mission is run on a server (I have tried two separate servers so far). I have tried using triggers in mission editor as well as using the LUA function outSoundForUnit. Again, both of these ways work in SP but not MP. If I change it to be sound to group or sound to coalition, it works in both SP and MP.

[Flappie]

Could you please attach a mission example?