The following pairs of translation strings both are translated the same in en_US, but show up separately in the subtitles.
"Shulker closes"
subtitles.block.shulker_box.close
subtitles.entity.shulker.close
"Shulker opens"
subtitles.block.shulker_box.open
subtitles.entity.shulker.open
To reproduce
Enable subtitles
Summon a shulker and place a shulker box next to it
Open the shulker box shortly after the shulker opens
→ ❌ Two identical subtitles are displayedClose the shulker box shortly after the shulker closes
→ ❌ Two identical subtitles are displayed
Video
[media]Related issues
Attachments
Comments

Can confirm in 21w07a.
Can confirm in 21w08a.
Can confirm in 21w11a.
Can confirm in 21w16a.
Can confirm in 1.17.
Can confirm in 1.17.1.

Relates to MC-226772.
Can confirm in 1.18.
Can confirm in 1.18.1.
Can confirm in 1.18.2.
Can confirm in 1.19 and 22w24a.
Can confirm in 1.19.2.