Deadman's Switch Bug
I came across this twice, once raiding and once testing my own outpost
In both instances, a guard with deadman's Switch is on a closed steep slope. Killing it means it'll slide down and explode down the ramp. However in both cases it beeps, flashes like it's going to explode, then completely disappears (no explosions, no body).
Feels like it clips through blocks, but not sure if that is what is causing the bug.