We recently migrated to the spreadsheet widget and have it set to scroll continuously. First, when the scroll reaches the end, it doesn't continue scrolling, it completely starts over. Second, after several minutes the widget simply stops scrolling.
Sorry to hear that you're having problems with the spreadsheet widget. I'm going to investigate the issue with a presentation myself and get right back to you. Could you provide either your company name or company ID so I can take a closer look?