That's an n of one (I could be wrong but its the only multi messenger GW event we've seen, with how many events are being generated, you'd have expected more). Could be a coincidence. The angular resolution of LIGO is not exactly amazing, and we don't have a real estimate of the distance to the source of the GW? In fact, IIUC the event could be exactly in the opposite direction too.

1 for 29 by 2019:

https://scholarcommons.sc.edu/phys_facpub/164/