As of 2019-01-22 there are still issues with the Mosquitoes. In addition, I have encountered problems with the oozes in the same area. When heading to the sewers you can even see an ooze clipping through a wall. When the oozes flee they have a tendency to get stuck in the narrow corridors between the pool sections of the sewers. Clipping issues have caused my characters to get stuck in the ceiling multiple times after getting summoned by a buggy ooze. This makes them unable to move, attack, or cast spells.
The sewer camp contains some of the best tradeable equipment I have seen (and arguably the best-in-slot boot for all casters). This obviously makes it very attractive as a camp but it is frustrating because as players we fight against bugs more than we fight against the enemies.