Ghast warning and shooting sounds are identically subtitled
As these are distinct sounds, distinct subtitles would be expected, however this does not happen.
This issue is easily reproducible with the /playsound command, with subtitles on. Run the following commands:
/playsound minecraft:entity.ghast.shoot master @p /playsound minecraft:entity.ghast.warn master @p
Both appear as "Ghast shoots"