The current portal user is not being saved when submitting a record. I have already assigned web roles to the contact, any ideas?

The current portal user is not being saved when submitting a record. I have already assigned web roles to the contact, any ideas?
Hello,
Is this a custom entity or a custom Entity Form? On the Entity Form you've configured you can configure the currently signed in portal user (contact) to be associated with a Lookup you have on your entity.
Inside of the Portal Administration app (model-driven app), open your Entity Form and take a look under the tab Additional Settings on your Entity Form and look for the section Associate Current Portal User on Insert.
There you can select the Lookup field you want to have filled automatically.
Please note this Lookup field needs to be a Lookup to the Contact entity!