I had been fighting a Crewman when he, through some odd manner, made it onto a rock next to a gated wall. He placed a beacon inside of himself and the beacon self-destructed or received friendly fire. This was unusual so I watched more carefully. Crewmen were placing beacons inside of themselves and making it to unfavorable locations for combat, such as surfaces with odd collision or are altogether obscured from the battle. Oddly, some AI would also stop moving or attacking once they had "disengaged" from combat through the previously mentioned behavior.