OneConnect always close server sessions

Hi all,

I'm noticing that on my one-connect profile i have strange Current Idle and Maximum values for :

--------------------------------------
Ltm::OneConnect Profile: my_oneconnect
--------------------------------------
Virtual Server Name    N/A

Connections
  Current Idle        4.2G
  Maximum             4.2G
  Total Reuses        4.9M
  New                16.5M

When i reset those statistics i have then the following display :

--------------------------------------
Ltm::OneConnect Profile: my_oneconnect
--------------------------------------
Virtual Server Name    N/A

Connections
  Current Idle        4.2G
  Maximum             4.2G
  Total Reuses        0
  New                 0

Moreover a network capture shows that servers connections are closed immediately by the F5, after receiving the HTTP response.

Here is the one-connect profile used :

ltm profile one-connect my_oneconnect {
    app-service none
    defaults-from /Common/oneconnect
    description none
    idle-timeout-override disabled
    limit-type none
    max-age 86400
    max-reuse 100000
    max-size 10000
    partition my_partition
    share-pools enabled
    source-mask any
}

Do have already noticed such values/behaviour ?

Thanks in advance for your feedback.

PS : F5 Firmware version 12.1.3