Subtitles "entity.horse.saddle" and "entity.pig.saddle" are identical, but show separately

The two translation strings subtitles.entity.horse.saddle and subtitles.entity.pig.saddle both are translated as "Saddle equips" in en_US, but show up separately in the subtitles.

To reproduce

1. Enable subtitles

2. Summon a tamed horse and a pig

3. Equip both with a saddle at the same time
   → ❌ Two identical subtitles are displayed

Video