  We examine whether the LHCb vector $ud\bar{c}\bar{s}$ state $X(2900)$ can be
interpreted as a kinematical cusp effect arising from $\bar D^*K^*$ and $\bar
D_1 K^*$ interactions. The production amplitude is modelled as a triangle
diagram with hadronic final state interactions. A satisfactory fit to the
Dalitz plot projection is obtained that leverages the singularities of the
production diagram without the need for $\bar{D}K$ resonances. A somewhat
better fit is obtained if the final state interactions are strong enough to
generate resonances, although the evidence in favour of this scenario is not
conclusive.
