Question How to prevent Spamassasin from creating attachment when moving message to "spam"

[nmpu]

Server operating system version

Ubuntu 22.04.3 LTS

Plesk version and microupdate number

Version 18.0.56 Update #4

Something has changed in my Spamassasin processing. I don't know if it's due to a recent server switch or just updated default behavior.

Spamassasin now wraps messages as an attachment when it moves the message to the spam folder.

All I want are the additional headers added and the score prefix in the subject. Is this still possible?