Preview pane in Windows 10 file explore will not show a preview of a PDF file if the filename has a "#" hashtag in it. We use PDF file names with a hashtags in them for purchase requisition tracking. Example: PR#1234. If we remove the hashtag it will show in the preview pane. This seems to have changed recently. Employees are reporting that Preview was working with files that had a hashtag in them previously. The exact change point is unknown. We checked other file types shuch as MS Excel and it was not a problem. Excel will show in the preview pane with a hashtag in the file name.
Anyone got a way to make this work without renaming thousands of files?