Hi Ihor,

> I cannot reproduce.
> Can you please provide detailed steps starting from emacs -Q?

The bug caused by the function org-table-clean-line​ calls the org-string-width​ inside a string-match​ clause without protection, for the org-string-width​ maybe change the match data then cause the string-match run into wrong result.

The attachment is a quick patch for the issue, please help to review and apply it, thanks