Bidirectional binding of length properties does not update both values correctly

[JordanMartinez]

As reported in TomasMikula/RichTextFX#535, binding two Vertical-Gravity Virtualized content's estimatedScrollY properties bidirectionally doesn't update them correctly. If the call is prop1.bindBidirectionally(prop2), the two values will be correct whenever prop1 scrolls but not when prop2 scrolls.

[Fibii]

I had this same issue, but i found a workaround it, i used a listener on the estimatedScrollYProperty and then updated the other area using setValue as shown:

textArea.estimatedScrollYProperty().addListener((observable, oldValue, newValue) -> lineCounter.estimatedScrollYProperty().setValue(newValue));

update: this works for stopping the automatic endless scrolling, but still gets the values messed up sometimes.