Manager show connected return strange elapsed

Good evening everyone.

Since moving to 21.4 (use to be on 15), I face a strange AMI behaviours :
after few days, regardless of the load, Asterisk stop sending event on AMI.

When I perform a manager show connected, I have this

asterisk*CLI> manager show connected
  Username         IP Address                                               Start       Elapsed     FileDes   HttpCnt   ReadPerms   WritePerms
  manager1         10.0.190.19                                              1727096060  4613        137       0         2147483647  2147483647
                   10.0.190.19                                              0           1727095927  571       0         0000000000  0000000000
2 users connected.

The Start and Elapsed looks very strange and doesn’t reflect the truth. The second manager connection is legit (we use 2 AMI connexion)

Where should I look to try to solve this issue ?

Thank you very much for your help