I approved that submission and I am pretty confident I didn't delete any description, and it doesn't look like any other admins did either. Seems like a bug, not sure how it would get into that state without admin edits.
Feel free to message me a description and I will add one back in.
We had an issue with some text sections disappearing from routes created on 11/28. This sounds like the same situation.
Most likely, our anti-spam tool deleted that text section accidentally. We fixed the root cause of this (user IDs colliding with route IDs), and stopped using our anti-spam tool for now. Sorry about that.