Changing columnwidths of a 2-column LB leaves column 2 in original size

I configured the listbox column widths as "* , * ". When I change the widths, the second column stays in the size that it had before the resizing began. Also, when I add a new row to a columnwidth-changed listbox, the listbox column widths jump back to "* , * ". When I configure the listbox as "50%,50%", it's the same...
Operating System
MacOS 26
Expected Result
The size of column 2 should be lbwidth-column1width and adding rows should not change the resized columns.