Frustration in magnets could stabilize both order and disorder. Exploring frustrated magnetism is of great importance to understanding the quantum many-body physics and developing the next-generation functional devices. Typically, ground state degeneracy and long-range order (LRO) tend to be mutually exclusive as the former is a character of disorder. However, in some rare cases, magnetic LRO could host a small number of degeneracy. The resulting magnetic ground state, phase separation, is intriguing in frustrated magnetism because it fills the gap between highly degenerate disorder and non-degenerate LRO. Recently, we have reported the existence of magnetic phase separation in gamma-CoV2O6. Here, we propose to use MuSR to unveil its driving mechanism by tracking the emergence and evolution of the dynamical short-range magnetic phase separation above the Neel transition.