Farmer villagers working is doubly subtitled, also displaying "composter filled"

When farmer villagers work, the subtitles read "composter filled" and also "farmer works." This is kind of silly. 

Steps to reproduce:

1. Enable subtitles

2. Spawn a villager and provide it with a composter so it becomes a farmer

3. Without providing it with anything to fill a composter with, wait for it to work at the composter

4. Observe the subtitles and the fact that the composter is not, in fact, filled

Expected behavior:

The subtitles would only read "farmer works"

Observed behavior:

The subtitles display both "composter filled" and "farmer works"