I created two Tab (Tab1 - Tab2), in Tab1 have added a field that affects the display of Tab2.
This works
In Tab2 I have a number of conditional fields. Even these conditions work well.
The problem comes when I try to save. In fact it does not save by latching on Tab2 as if there are more fields to be filled.
If blocking the condition in Tab1 then it works all right.
The tab1 Field is not conditioned in any other field.
I doubt arises that you can not condition a Tab that inside has conditional fields?.
Let me know what can be, thanks

Ok, I think that actually is a bit complex to explain in this way.

First, I am attaching the database to make it quite clear.

We have two tabs: "Impostazioni" and "Volontariato”. The first one has only one field from which depends the second tab. The tab appears if "cb_attiva_volontariato" is set to "Si”.

In conditioned tab we have four "cascade" fields.
cb_campo_volontario_utente_area has only one value. Selecting it, cb_campo_volontario_pet_therapy_attivita_utente appears.
cb_campo_volontario_pet_therapy_attivita_utente has two values: "Conduttore del Cane" which will bring cb_campo_volontario_pet_therapy_tecnico_coadiutore and "Veterinario" which will bring cb_campo_volontario_pet_therapy_veterinario_qualif.

The problem is when you try to save the first time. This is not allowed and an error appears on the tab (such as when there are fields to be filled).

After several tests, I noticed that the problem seems to be in the condition of the tab, more precisely when you select "Si". In fact, if you try to put everything on a tab, it works.

Please, can you try with the DB I attached to understand where is the problem?