Invalid form key. Please refresh the page on Front End

When I try to login as user I have the problem of invalid form key on frontend. Once the page is refreshed, the login works.

We have 4 sites

1. main.it
   subdomain.main.it

2. second.it
   subdomain.second.it

What could be the cause?

I’ve tried different setups on the fields -> Cookie path & Cookie Domain

But the problem is always there.

magento 2.4.3