  A thorough study of the $J^{PC}=1^{++}$ elastic $D^{0}\bar{D}^{\ast0}$ and
$D^{+}D^{\ast-}$ scattering, where the form of the meson-meson interaction is
inferred from lattice QCD calculations of string breaking, is carried out for
center-of-mass energies up to 4 GeV. We show that the presence of
$\chi_{c1}(3872)$, which can be naturally assigned to either a bound or virtual
charmoniumlike state close below the $D^{0}\bar{D}^{\ast0}$ threshold, can
overshadow a quasiconventional charmoniumlike resonance lying above threshold.
This makes difficult the experimental detection of this resonance through the
$D^{0}\bar{D}^{\ast0}$ and $D^{+}D^{\ast-}$ channels, despite being its
expected main decay modes. We analyze alternative strong and electromagnetic
decay modes. Comparison with existing data shows that this resonance may have
already been observed through its decay to $\omega J/\psi$.
