Hi @vormia,
This is similar to an issue we encounter in Cyrillic character sets – see Cyrillic 'b' treated as 'enter' in keywords. The problem is in the third-party tag-it library we use for keyword entry, and the solution will probably be to replace it. See Resolve TagIt's keyword separator character interference (Arabic/Cyrillic) · Issue #4208 · pkp/pkp-lib · GitHub for details.
Regards,
Alec Smecher
Public Knowledge Project Team