Submitting listing addition form cause form reload and it has empty fields and i do not see the submission in admin area anywhere, Listings section, All listings (/wp-admin/edit.php?post_type=hp_listing)
Disabling the snippets in “Code Snippets” plugin does not help.
What helped was to disable all plugins but HivePress. Then enabling one by one to find out the cause, the cause was LiteSpeed Cache plugin. I am unsure what in it fails and if clearing its cache is ultimate long-lasting solution.