We are facing problem to use a list page using modern experience, which we suspect due to recent SharePoint Online upgrade.
We notice SharePoint Online was upgraded recently, which has sticky column headers in list page. One of our list page with lot of columns is unable to be used, because Toolbar is missing while data is loading. After awhile, whole page of list is gone blank.
The list page totally is unusable in modern experience, whereas previously it worked, unless we changed it back to classic experience.