Rspamd set to header does not work.

When the spamfilter policy is set to Header for Rspamd, it still modifies the subject.
On checking the /etc/rspamd/local.d/users/
it is set to the following.

Code:

                        actions {
                                        "rewrite subject" =  5;
                                                        "add header" =  5;
                                        reject = 16.4;
                                                greylist = null;
                                        }

From what I understand rspamd cannot do two actions. In this case, it cannot do "rewrite subject" and "add header" together. So it is doing the rewrite subject.
Could this be the problem?
If the add header is to be active, then I think the following should be set. Please share your thougths.

Code:

                        actions {
                                        "rewrite subject" =  null;
                                                        "add header" =  5;
                                        reject = 16.4;
                                                greylist = null;
                                        }

By the way, is greylist set to null because of postgrey? And the feature through the ispconfig web interface has not been implemented for rspamd?

For reference, here is the setting in ispconfig.
ispconfig > email > spamfilter > policy
I set the policy Normal to the following.
Tab Policy
Policy Name: Normal
Virus lover: No
Spam lover: No
Tab Rspamd
Greylisting level: 4.00
SPAM tag level: 5.00
SPAM tag method: Header (adds "X-Spam: Yes")
SPAM reject level: 16.40

 

opps. My bad. I should have checked first. I think this is the one.
https://git.ispconfig.org/ispconfig/ispconfig3/issues/5543

With regards to,
By the way, is greylist set to null because of postgrey? And the feature through the ispconfig web interface has not been implemented for rspamd?
Is my assumption correct?