See title.
If you create a function that both teleports the player away, and plays a sound at the new location, the sound is played, but no subtitle shows.

Steps to reproduce:

1. Create a data pack with a function containing

   teleport @s ~ ~50 ~
   execute at @s run playsound minecraft:entity.arrow.hit_player master @s ~ ~ ~ 1

2. Enable subtitles in the settings and make sure master slider is turned on
3. Run the playsound command by itself /playsound minecraft:entity.arrow.hit_player master @s ~ ~ ~ 1
4. Observe how the subtitle shows up
5. Run the function /function <name you gave the file>
6. Notice how you hear the sound, but no subtitle shows up