Still seeing "systems are not responding" error on reward flight search page.

Departure country - USA
City - Seattle
Destination - LON
Flexible travel dates - May selected
Travel Class - First
# of seats - Adults - 1
Show available destinations - on a map

I've tried searching many times over the last week or so. I've never been able to get April or May to return results. Earlier months will sometimes return results.

I have not had any issues selecting individual dates. Eh, unless you want to count the carpal tunnel syndrome I'm developing trying to find some availability with individual day searches