AgGrid angular scrollbarWidth only applying to the horizontal scroller

AgGrid has a parameter called scrollbarWidth which I can pass into the grid as a number. I was hoping it would alter the width of both the horizontal and vertical scrollbars but it only seems to affect the horizontal scroll width. The vertical scroller seems to stay the same

<ag-grid-angular
  #agGrid
  style="width: 400px; height: 400px;"
  id="myGrid"
  class="ag-theme-balham"
  [columnDefs]="columnDefs"
  [defaultColDef]="defaultColDef"
  [rowData]="rowData"
  (gridReady)="onGridReady($event)"
  [scrollbarWidth]="8"
>
</ag-grid-angular>

My goal was to change the scroller width for both horizontal and vertical and get both of them same width.

Tried my best to create a demo of the issue I have.

Help is much appreciated, Thanks