HA fsso question

Hello,

I have a fortigate 800C 5.2.9 HA active/passive.

I've noticed that the slave has really few fsso logons :

diagnose debug authd fsso list

Total number of logons listed: 151, filtered: 0

While master have all of them :

diagnose debug authd fsso list

Total number of logons listed: 2454, filtered: 0

I have to move from master active to slave active. Becuase not all fsso logon are replicated I guess after slave becomes active users will get the prompt login :(

Is that normal behaviour or should fsso logons be all replicated to the slave unit ?