Not sure if this is a bug or working as intended. On 1/8/21 at about 10 am I was running the Void Sanction: Candlelight mission at Level 37 (5/+0). Nearly all the Council mobs conned at the appropriate level, however I ran into one group that conned at Level 19.
Server: Everlasting
Character: Scorpio415 (level 37)
Mission: Void Sanction: Candlelight
Date/time: 1/8/21 about 1000 PST