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In its third observing run, the LIGO/Virgo collaboration has announced apotential neutron star-black hole (NSBH) merger candidate, GW190426_152155.Together with GW190814, these two events belong to a class of binaries with asecondary mass less than $3 \, M_{\odot}$. While the secondary system inGW190426_152155 is consistent with being a neutron star with a mass of$1.5^{+0.8}_{-0.5} \, M_{\odot}$, that of GW190814 is a $2.59^{+0.08}_{-0.09}\, M_{\odot}$ object and counts as the first confirmed detection of a mass-gapobject. Here we argue that these two events could have a common origin asfollows: both are formed as NSBH systems; however, the larger escape velocityof a system with more massive primary BH increases the bound fraction of theejecta material from the supernova explosion leading to the formation of a NS.This bound material forms a disk, which is preferentially accreted onto the NS.This scenario predicts the secondary component mass should correlate with theprimary component mass, which is consistent with GW190426_152155 and GW190814.If this hypothesis is corroborated by upcoming observations, GW190814-likeevents can be excluded from the binary black hole population when inferringtheir global characteristics.

A Common Origin for Low Mass Ratio Events Observed by LIGO and Virgo in the First Half of the Third Observing Run