UX review is ignored if group designers are unavailable
Discovered in !212 (comment 1521580351)
When the UX label is added Reviewer roulette should suggest a reviewer if the group has a designer assigned to it. There is a bug that causes a reviewer to not be suggested if the group's designer(s) are not available.
See !212 (comment 1522473505) for the detailed explanation.
Edited by Lin Jen-Shin