SplitPositionChangeEvent.getPreviousPosition() always returns 0.0

[honest-niceman]

Environment
Platform version: 7.2.13
Client type: Web

Description of the bug
Minimal reproducible example

Create screen and add SplitPanel

<layout>
    <split id="splitPanel"
           height="300px"
           width="100%"
           orientation="horizontal">
        <hbox caption="hbox1" width="100%">
            <label value="Label1"/>
        </hbox>
        <hbox caption="hbox2" width="100%">
            <label value="Label2"/>
        </hbox>
    </split>
</layout>

Add SplitPositionChangeEvent in the screen controller

@Inject
private Notifications notifications;

@Subscribe("splitPanel")
public void onSplitPanelSplitPositionChange(SplitPanel.SplitPositionChangeEvent event) {
    notifications.create()
            .withCaption("New position: " + event.getNewPosition() + "," +
                    "Previous position: " + event.getPreviousPosition())
            .show();
}

Expected behavior
getPreviousPosition() method returns corect values

Actual behavior
getPreviousPosition() method always returns 0.0

splitcuba.mp4