https://bugs.winehq.org/show_bug.cgi?id=55868
--- Comment #7 from vt vturek@centrum.cz --- You can test this, e.g., in Bulk Rename Utility ( https://www.bulkrenameutility.co.uk/Download.php ; there is a portable version: https://www.bulkrenameutility.co.uk/Download.php#DownloadPortable ).
In the latest screenshot, you can see what happened when I copied the text "<HT>test<HT>abc" ("<HT>" == horizontal tab character) from the default Ubuntu notepad into the indicated text field.
Just as in the case of the original (in-house) application, the horizontal tabs are not rendered in the text field, yet are visible in the tooltip (i.e., the field value includes them).