According to the new physics fermion repelling black hole of Quantum FFF Theory, this could be the result of a splitting black hole by a much smaller BH. The result is two equal sized BHs forming the "bowshocks" of a a Herbig Haro system with quick star formation in between, and the splitter BH probably left behind or absorbed by the larger BHs.
see: https://www.sciencenews.org/article/cow-cosmic-flare-new-star-death-supernova-black-hole?fbclid=IwAR003CanTFDPdc8EOlW9shqdz8mSI8Pui38klTWnXQqlBtYnDkZvDnIuUMU
and:
2 Signals for Retarded Single Big Bang Black Hole Nucleus Splitting and Pairing into Dual Black Hole Herbig Haro Systems.
http://vixra.org/pdf/1704.0133v2.pdf
and: http://vixra.org/pdf/1709.0388v1.pdf
