Yes, I did. I used the "Report an Issue" facility within Chrome. No replies yet.

If you look at the small demo page I have put up at https://criticalsurveys.co.uk/chromecolcount.htm you can see that the items past a certain point (dependent on the screen size available to the browser), are invisible. It's as if their 'visibility' css property has been set to 'hidden'. Use the horizontal scrollbar to see this. This never used to happen until a couple of months ago. One of those updates has broken multi-column display. Can someone at Opera or Chrome (to whom I have also reported this) please fix this embarrassing error? Firefox, Edge and Internet Explorer all render this with no problems at all.