Matrix visual column width problem started April 25-26th

Thank you v-sshirivolu for attempting to reply. However, I think you've missed that I have it working fine in Power BI Desktop but it breaks when published to Power BI Service, and in Edit mode in Power BI Service, some things slightly work but it is no longer possible (this week) to adjust the column to the correct width. Since finding the problem, I have tried all combinations of turning the Auto-size on and off (with grow or fit settings), word wrap on and off and various other options - none of them work correctly anymore in Power BI Service.