Fortigate SSO authentication reset

Hello,

I have two questions that are not related to one another.. or rather partially related,

1.

I have fortigate with two FSSO agent collector. The active one has been restarted so fortigate switched to the second one as expected. However, even though I'm not sure users encountered authentication issues, I found that all FSSO logons duration where resetted. Could that indicate that FSSO users experienced some authentication issues ? Or is that just a planned behavior with no temporary autentication failure ?

2.

Still talking about FSSO agent collector, I noticed that if I add or remove AD groups to be monitored, the agent collector always loose all users logon. Is that also a planned behavior ?

Thank you