As of LittleTiles_v1.5.0-pre135_mc1.12.2, key control descriptions are missing English translation.

Yes, I have the same problem here, too，and Advanced drawing for door animation effects preview, sometimes not shown

Added them, will be part of the upcoming pre-release (maybe this week). I will close this issue for now. Thanks for reminding me!
@EdgewalkerBlue create a new issue and it would be awesome if you could provide a screenshot of the problem.