I remember hearing about this too, and take this with a grain of salt as there seems to be contradicting reports on whether, or not they actually worked directly with each other, and whether, or not Floyd actually worked at the same place in general, but allegedly the club they both worked at was really sketchy, and for a brief while, there was a theory going around that Chauvin killed Floyd because of some shady shit that happened back there.
I don't think it's true, because there's too many contradicting accounts, and not enough tangible evidence, but if it is, it would definitely explain a few things.