[Samba] loosing domain connnection

[jmpatagonia]

Hello I have a problem with a PC linux on domain samba 4 AD.

os= installed Ubutu 16.04 Xenial
joined to domain

When I restart the PC simple can't  logon anymore on domain, the correct
user/password for domain not validated.

But if a open a shell whit a local user and execute getent password or
getent group, this work fine, and later yes can logon on domain correctly.

I observe that when logon on shell not see the domain data like -->
drwxr-xr-x   2 nobody 50002  4096 feb 10 07:34 scripts
but later when execute getent, immediately this correct -->
drwxr-xr-x   2 nobody domain users  4096 feb 10 07:34 scripts

And later can logon on domain right.

Is like loose the domain connection and this activate when do a getent.

regards.