  A great deal of many-body localization (MBL) has been learnt from the
one-dimensional (1D) spin or fermion systems where the carriers are sort of
scatter particles. By ontrast, the situation when multiple interacting bosons
are clustered in a random potential remains much unexplored, albeit highly
demanded. By using the numerical quantum quench dynamics, we study the
symmetry-resolved entanglement entropy in a disordered Bose-Hubbard (dBH)
chain, concentrating on the two types of inhomogeneous initial states to target
the lower- and the higher-energy section of its dynamical phase diagram. From
time-evolving a line-shape initial product state, we discover a hidden order:
the sudden formation of the entropy imbalance across the different symmetry
sectors, resulting in an entanglement-channel wave (ECW). Intriguingly, ECW
melts in the strong-disorder limit. We conjecture the melting of ECW and the
freezing of CDW are duo traits inherent to the disorder-induced MBL. Relatedly,
a channel-resolved reanalysis hints the previously observed double-log growth
of the number entropy may not indicate the breakdown of MBL for scatter
particles. Through further exploiting the dynamical consequences of loading
bosons onto one site, a cluster localization unique to the BH-type models
emerges at the weak disorders. Collectively, the unraveled entanglement
structures and dynamics manifest the dBH model's richness from a jointly
energy- and symmetry-resolved perspective.
