SEP clients wont change to a specific group policy

Hi guys im facing an issue, hope you can help me with this.

Right now in SEPM i have the following group policy distribution:

1 My Company

 1.1 Dept 1
 1.2 Dept 2
 1.3 Dept 3
 1.4 Dept 4

Those policy groups have different kinds of access and restriction,

Since two days ago when i move a client from dept 4 to dept 1 was okay, but when i tried to return the client to original group, i can see in SEPM that client pc its already change but in SEP client is still in previous policy group.

No matter how many times i update policy in client PC the policy wont change, weird thing is that just happens in some groups not all,

Right now in Dept 4 group cant add any client PC,

Do you have any idea how to troubleshoot this ?

Regards