See attached video.

Slider, which I use to set current value ("controling slider") bidirectionaly binded to current value property of tested slider (further "tested clider"). When I change value of tested slider using controling slider (i mean, using binding), change value property doesn't show it (you can see it on the left text fild, which listen changes using change listener or by toggle button, which is binded unidirectionaly). But when I use tested slider's knob, everyting works well.

This problem is actual for setting values using bidirectional or unidirectional bindings.