Missing subtitles' translation file using one sound by /playsound

When using this command (/playsound minecraft:block.end_gateway.spawn master @p) and having subtitles on (ESC>Options>Music and Sounds>Show Subtitles : ON) it shows 'subtitles.generic.entity.explode' - the entry is missing its translation file.

Steps to reproduce:
1. Enter a world _{(or create a new one, creative is optional, CHEATS HAVE TO BE ENABLED!!!)}
2. Enable your subtitles _{(press ESC then go to Options, Music and Sounds, Show subtitles:ON)}
3. Use this command:

/playsound minecraft:block.end_gateway.spawn master @p

4. Watch the no-translate subtitle