This seems unlikely - if you don't have any rules in place on the LEM appliance that log people out, the agent wouldn't do this on its own. The only "offline" policy in place is related to USB devices, so that shouldn't cause a reboot either. I suppose a remote possibility is some kind of conflict with anti-virus, but usually that prevents the agent from running, rather than causing other weird behavior.
At least to confirm for you, we have NOT had other reports of this, and we do have a LOT of agents out in the field.