The new version of the filter is not always convenient. Is it possible to return the way it was before? So that the drop-down list always opens downwards.
At a certain position of the page, or on some computers, the selection window in the filter opens upwards, and in this mode it is very inconvenient to use it.
https://drive.google.com/file/d/19N6YH8SdQ0Q9KN6z740t17cTrWXomArg/view?usp=drivesdk
I haven't modified the render of the fields. Try to assign the default template (Cassiopeia) to the abook search menu item then tell me if the problem occurs again.
Yes, the filter works fine with Cassiopeia.
I'll write to the template developer