The main advantage I have found of bi-wiring is the maid occasionally deep cleans the house and somehow manages to unplug very secure connections.
She pulled one of the negative cables to my B&W 800 out and I didn’t notice for a week. Ran fine.
You should have lost output from a driver if you bi-wired correctly with a different set of cables to separate inputs of independent drivers. Are there still jumpers of some sort between the inputs?