  Recently, Graham et al. (2020) identified ZTF19abanrhr as a candidate
electromagnetic counterpart to the binary black hole merger GW190521. The
authors argue that the observations are consistent with a kicked binary black
hole interacting with the accretion disk of the activate galactic nucleus AGN
J124942.3+344929. If a real association (rather than happenstance), this has
implications for the sources of LIGO/Virgo binary mergers, future prospects for
electromagnetic counterparts, and measurements of the expansion rate of the
Universe. In this Letter, we provide a re-analysis of the multi-messenger
coincidence significance based on the localisation overlap and find that that
the odds of a common source for GW190521 andZTF19abanrhr range between 1 and 12
depending on the waveform model used; we consider this insufficient evidence to
warrant confidently associating GW190521 with ZTF19abanrhr.
