A DESCRIPTION OF THE PROBLEM :
When removing an invalidation listener from a property during invalidation a subsequent change listener might not be called if the change listener is (after the removal) the last listener for that property. I noticed that issue when adding a change listener to the showingProperty of a window. By calling hide I expected my change listener to fire but it didn't. I found that the issue lies with the ExpressionHelper when there is a switch from Generic to SingleChange. The currentValue is discarded in favor of the value currently held by the property.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the attached test case. When you add another change listener as described in the workaround, the code runs without error.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
A registered change listener fires, when the value of the property has changed.
ACTUAL -
A registered change listener does not always fire even if the value of the property has changed.

---------- BEGIN SOURCE ----------
import javafx.beans.InvalidationListener;
import javafx.beans.property.BooleanPropertyBase;
import javafx.beans.value.ChangeListener;
import org.junit.Test;

import java.util.concurrent.atomic.AtomicInteger;

public class JFXPropertyTest {
  @Test
  public void testJFXProperty() {
    AtomicInteger test = new AtomicInteger(0);
    ChangeListener<Boolean> testListener = (observable, oldValue, newValue) -> test.incrementAndGet();

    assert test.get() == 0;
    TestProperty testProperty = new TestProperty(true, (object) -> {});
    testProperty.addListener(testListener);

    testProperty.setValue(false);
    assert test.get() == 1;
  }

  private static class TestProperty extends BooleanPropertyBase {
    private final InvalidationListener invalidationListener;

    private TestProperty(boolean value, InvalidationListener invalidationListener) {
      super(value);
      this.invalidationListener = invalidationListener;
      addListener(invalidationListener);
    }

    @Override
    protected void invalidated() {
      if (!getValue()) {
        removeListener(invalidationListener);
      }
      super.invalidated();
    }

    @Override
    public Object getBean() {
      return null;
    }

    @Override
    public String getName() {
      return "test";
    }
  }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
- add another dummy change listener so that there are always at least two listeners present.

FREQUENCY : always