My MX Master 3 does not flow anymore. I got a new computer from work and replaced the old one in the flow.

When my Macbook Pro M1 flows to the new machine it works, but when I go the other way it defaults to the third device that is connected but that is not involved in the flow. I have tried to reset everything but to no avail. I juggled the order of the devices, but again to no avail.