Forms "Save" button doesn't work (can't save forms)

Dear Balbooa Team!
First I would like to congratulate your renewed site and design and new services!
My problem is that on latest Joomla 5.0.0 (PHP 8.2, MariaDB 10.6.16) in the latest BaForm 2.2.1 the "Save" button doesn't save anything when editing a form.
There is no error appearing just simply not saving anything.
I suspect something issue in server (PHP) side but I don't know how to continue troubleshooting. Could you check and advise please?
Thanks,
Tegger

PS: in old forum I have found a "saving issue" here: https://support.balbooa.com/forum/joomla-forms/18262-form-doesn-t-save-changes - but I think my issue is not related to .htaccess rather than some PHP extension/parameters.

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