LTM Policy - Insert Header on Response

Hi all,

I'm having an issue with LTM policies to insert header on response. Here's the working configuration 1 policy with 3 rules

 rules {
    Pool1_rule {
        actions {
            0 {
                forward
                select
                pool Pool1
            }
            1 {
                http-header
                response
                insert
                name Content-Security-Policy
                value "frame-ancestors 'self';"
            }
            2 {
                http-header
                response
                insert
                name X-Content-Security-Policy
                value "frame-ancestors 'self';"
            }
        }
        conditions {
            0 {
                http-host
                values { pool1.mysite.com }
            }
        }
    }
    Pool2_rule {
        actions {
            0 {
                forward
                select
                pool Pool2
            }
        }
        conditions {
            0 {
                http-host
                values { pool2.mysite.com }
            }
        }
        ordinal 1
    }
    Pool3_rule3 {
        actions {
            0 {
                forward
                select
                pool pool3

        }
        conditions {
            0 {
                http-host
                values { pool3.mysite.com }
            }
        }
        ordinal 2
    }
}
status published
strategy /Common/first-match
}

This Policy works because the headers are added in the first rule. If you change the order of the rules, for example add the headers in the second rule the headers are not added on the response.

rules {
    Pool2_rule {
        actions {
            0 {
                forward
                select
                pool Pool2
            }
        }
        conditions {
            0 {
                http-host
                values { pool2.mysite.com }
            }
        }
    }
    Pool1_rule {
        actions {
            0 {
                forward
                select
                pool Pool1
            }
            1 {
                http-header
                response
                insert
                name Content-Security-Policy
                value "frame-ancestors 'self';"
            }
            2 {
                http-header
                response
                insert
                name X-Content-Security-Policy
                value "frame-ancestors 'self';"
            }
        }
        conditions {
            0 {
                http-host
                values { pool1.mysite.com }
            }
        }
        ordinal 1
    }
    Pool3_rule3 {
        actions {
            0 {
                forward
                select
                pool pool3

        }
        conditions {
            0 {
                http-host
                values { pool3.mysite.com }
            }
        }
        ordinal 2
    }
}
status published
strategy /Common/first-match
}

Is this a limitation in LTM Policies?

Thanks,