The server logs say everything's working, so I hope not! Are you still having trouble?
Sometimes I get tricked when I enter a query that has the same top result as the one that's currently displayed. Then it looks like the results haven't changed, but further down the list, they have.
Same problem here, on the latest firefox & Archlinux. It searches properly when you hit search but it does not respond to hitting enter on the keyboard.
It also does not find anything for "duck sized horses" or "horse sized duck".
Edit: We have this fixed but we're reluctant to roll it out. Two days ago when we did an AWS deploy, they replaced healthy machines with unhealthy ones, and we had an hour of outage.
If you want to fix this on the client, I think the following quick fix works. At the bottom of the sense2vec script https://sense2vec.spacy.io/js/sense2vec.js , change: