webix custom scroll, strange behaviour

Hello , I have a problem with custom scroll :

https://snippet.webix.com/1za945wr

If I click on the scroll , I keep the mouse pressed , I put the focus outside of the navigator and release the button : In navigator the scroll is attach with the slide of mouse as long as a new click.
Is it normal ? is it possible to not have the behaviour ?

Thanks

Hello,

The issue has been fixed in the recent 6.0.9 version, in both GPL and PRO packages.

Ok , thanks