Continuity mistake: When Taggart shoots the pile of skin grafts, it explodes, covering him, Jack, and Jo in guts. There's nothing on Tag's shoulder at first, but after a couple of shots, there is now a slab of skin on his right shoulder.
Other mistake: When Allison video calls Jack as he's finishing bathing, apparently she can see below the belt, as she remarks for him to cover himself up. But he gets dressed and doesn't move any reasonable distance from the screen, and we then see Allison's view which only captures Jack's torso, so she never would have seen his privates anyway.
Chosen answer: He's still around, we've just not seen him lately, as scenes with Blake have been mainly at work, where Kevin wouldn't be.
Tailkinker ★