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".

Nothing happens for me where I press enter either, I have to click on the search icon (firefox on linux).

Working on this. Thanks.

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:

    input.addEventListener('keydown', function() {
       if(event.keyCode == 13) run();
    });

to

    input.addEventListener('keydown', function(event) {
       if(event.keyCode == 13) run();
    });

Also noting that linking URLs with the pipe symbol (eg https://sense2vec.spacy.io/?Autechre|PERSON) will result in the "|PERSON" being dropped from the search box.