/playsound delayed execution on stream sounds

Summary: When running the /playsound command multiple times in a function, the expected behavior is for all soundtracks to play simultaneously. However, there is a noticeable delay between each execution, causing the sounds to stagger and play sequentially instead of at the same time. This behavior negatively impacts attempts to create multi-source stereo music in-game, as it results in disjointed and awkward sound playback.

Steps to Reproduce:

1. Create a function with multiple instances of the /playsound command, such as:

playsound minecraft:music_disc.pigstep master @a
playsound minecraft:music_disc.pigstep master @a
playsound minecraft:music_disc.pigstep master @a
playsound minecraft:music_disc.pigstep master @a
playsound minecraft:music_disc.pigstep master @a

1. Execute the function in-game.
2. Notice the slight delay between each sound, instead of simultaneous playback.

Expected Behavior: All tracks should be played simultaneously.

Attached RP: used to test pigstep without being streamed
Attached DP: use /function mc277562:play_4_stream to run the above example