DesktopListBox - column titles shift to left when showing scrollbar

Addendum:
Besides setting column widths as fixed values, as suggested by @Emile_Schwarz, I found a solution for dynamically showing/hiding the scroll bar macOS-style here:
https://forum.xojo.com/t/is-it-possible-to-get-os-x-scrollbars-on-a-listbox/25296
The solution suggested by @Michel_Bujardet works very well.