Instability

[Raeanne Dimick]

The quality or condition of being unstable; want of
stability, firmness, or steadiness; liability to give way or to fail;
insecurity; precariousness; as, the instability of a building.

[Mary Mallozziberg]

uncertainty caused by the possibility of a sudden change in the present situation:

[Sommer]

Lack of stability; the state of being unstable.