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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 isinferred from lattice QCD calculations of string breaking, is carried out forcenter-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 virtualcharmoniumlike state close below the $D^{0}\bar{D}^{\ast0}$ threshold, canovershadow 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 itsexpected main decay modes. We analyze alternative strong and electromagneticdecay modes. Comparison with existing data shows that this resonance may havealready been observed through its decay to $\omega J/\psi$.

$\chi_{c1}(2p)$: an overshadowed charmoniumlike resonance