Question -- Jump ball right after opening Jump ball

[bradfordwilkins]

Jump Ball after the jump ball.

A1 and B1 go up for the opening jump simulteously (to the naked eye at least lol) tip the ball off in between A2 and B2, who both grab it at the same instant.

No possession arrow has been established, so whats the call?

I decided to rejump it, but was that the right move? I couldn't think of anything else short of flipping a coin haha.