Cannot pass item with % symbol in sales and purchase

I was not able to edit an item created through purchase invoice screen with % symbol. It is showing a missing page . Please find the screen shot .It is a bug seemingly.Can anyone confirm ?

I have found this error in both ver 10 and ver 11 master

Yes this is a bug or defect - the search fails gracefully, without an error traceback to troubleshoot.

% is a ‘special character’ that probably should be restricted in an item name.

This will give you insight Search results for 'meta character' - ERPNext Forum

More rigourous input validation and testing would screen for this case.

You may want to ‘scrub’ your data here.

EDIT: This is recent [v11] Why am I getting a Unicode Error in Production Server but not on my test environment for special characters?