[resolved] CSRF issue when ajax functions and normal forms are used on the same page

Ok... I've finally found it ! It was not a question of focus...

When we use the function form_open(), CI4 automatically creates an hidden file with CSRF tokens... So you just need to update the hidden input with current CSRF coming from ajax. I did something like : $("input[name='csrf_token']").val(csrf);

Thank you anyway for the help :-)