Gateway error when trying to judge division

Everything else on the site seems to be working, but when I try to judge the final division of my Fall Spectacular show, the site gets really slow and then gives me a gateway error. It happens both on Edge and Chrome.

It looks like this is timing out because there were nearly 10,000 entries in a single division, and currently the system works by checking all the classes within the division for the callback horses. With so many entries to check in one go, it just can't complete the request. Our programmer is currently looking into fixing the inefficiencies behind this so that you can get it judged. Will get back with an update on it ASAP!

Sorry for the delay, we made the fix and then the intense lag issues came immediately after so we reverted the fix trying to figure out if it was the cause. We've replaced the fix, so you should be able to finish the show judging now!