I am planning to add a filter with XY control to a project, and was testing the examples/effects/filters/bandfilterII in ableton, and I noticed when I would try to control the XY pad parameters from the ableton mapping interface, the XY GUI does not move to visually represent the accurate position.
Cabbage XY Pad Daw Automation not visually represented video
Also as an aside, it looks like the range slider GUI does not affect the values of the filter when adjusted directly, I think this could be resolved by making the XY pad control the range slider and then the range slider controls the filter cuttoff values.
This other thread may be relevant, it looks like the automation of xy pad last year would bring down the host, maybe the GUI update was hacked out to bypass the issue? not sure.