Duplicate entries in issue filter values
when filtering the issue list for multiple assignees, the redisplayed filter values box contained the selected users twice - once under their option group (i.e. 'active'), and once below, without any option group:
The cause was using
.last when computing missing entries, which will not return the
id as expected in the case of 3-element array values. Using
 instead fixed this. That bug was observed on 3.4 through to current master.