APM clientlessmode + HTTP_RESPONSE_RELEASE issue

I'm definitely seeing those events in 11.4 HF3. Which version?

Can you try this on a test VIP with simple access policy and see what you get:

when HTTP_REQUEST {
    log local0. "here"
    HTTP::header insert "clientless-mode" 1
}
when HTTP_RESPONSE {
    log local0. "here"
}
when ACCESS_SESSION_STARTED {
    log local0. "here"
}
when ACCESS_SESSION_CLOSED {
    log local0. "here"
}
when ACCESS_ACL_ALLOWED {
    log local0. "here"
}
when ACCESS_POLICY_COMPLETED {
    log local0. "here"
}
when HTTP_REQUEST_SEND {
    log local0. "here"
}
when HTTP_REQUEST_RELEASE {
    log local0. "here"
}
when HTTP_RESPONSE_RELEASE {
    log local0. "here"
}