How to control Bootstap4 on a full screen

Hi, this is probably a small issue to the gurus, but I need a hint.

I am creating a page with this layout.

image1054×133 6.23 KB

This is screen size Desktop(xl) and is acceptable for now (it will be smartened up before it is presented to the client). Anyway when I Open in Browser on my laptop or on my PC, I get…

There is plenty of room on the screen for the columns not to wrap, is this bootstrap4 calculating that they have wrap?

I always have to do small tweeks to the column widths in the different screen sizes, from phone up to desk top, but this seems out of reach to adjust.

Is there a way to get control of how the blocks are displayed on ‘full’ screen?