Captions for subtitles.block.generic.step string of text missing

The caption for subtitles.block.generic.step shows as subtitles.block.generic.step with closed captions on.

-Turn captions on
-Summon a baby chicken
-Look at the subtitles as the baby chicken moves

Expected result:
A different string of text (i.e. Chick walks)
Actual result:
The string of text is subtitles.block.generic.step