GUI Freezes when searching long titles with some characters

[riparise]

JabRef version 5.2 and 5.3 on Windows 10

GUI Freezes when pasting or typing a long title in the search bar. It freezes if title has some characters (e.g "," or ".")

Steps to reproduce the behavior:

1. Click on the search bar on lower left (for example ArXiv)
2. Paste the following title: "Introduction to Quantum Mechanics - David J. Griffiths, Darrell F. Schroeter"
3. GUI freezes

If the title is "Introduction to Quantum Mechanics David J Griffiths Darrell F Schroeter" there is no problem.

[Siedlerchr]

Thanks for your report! The issue has been fixed now in the latest master by #7391.

[Fu188]

Thanks for your report! The issue has been fixed now in the latest master by #7391.
The current solution is just to remove the syntax check. But I think it is unreasonable to remove the syntax check. I have fixed this issue in another way and the syntax check is remain. Would you please to reopen this issue that I can pull request my solution?