Copper Trapdoor Subtitles Issue

When you use the new copper trapdoor, the subtitles say subtitles.block.copper_trapdoor.toggle instead of the usual Trapdoor Opens/Creaks/Opens

What I expected to happen was...:
I expected the subtitles to say Trapdoor Opens/Closes.

What actually happened was...:
The subtitles say subtitles.block.copper_trapdoor.toggle.

Steps to Reproduce:
1. Get a copper trapdoor in the experimental version.
2. Turn on subtitles
3. Place it down.
4. Flick it.
5. Read the subtitles.