None of the commands are formatted in the multi-channel format, so the binding can’t tell the difference between the switches.
I suspect that this is a change in Fibaro firmware. In the past, they always sent status using the MC commands. There has been a change in the recommended way to do this in recent versions of the standards, and I guess that they have now implemented this…
Probably this is solved in the latest development binding where I added support for autosetting the lifeline association group using multi channel associations, and this should (I hope) trigger a change in the way the device works.