Dormancy

undefined: Dormancy is a state of inactivity during which a system member, sisasystem, or the like will be "asleep" for a certain amount of time, usually marked by difficulty in calling or triggering them to the front.

This could be short-term or long-term, and shallow. Shallow dormancy is when the headmate(s) in question are relatively easy to call or trigger to the front but may simply desire to be inactive/resting.

There are many reasons for a headmate or sisasystem to become dormant, usually due to stress/overwhelming emotions put on the member(s), or it is meant to benefit the system as a whole.