False positive on .XLSX password protectd

Hello, i can’t send and recive .xlsx attache if password protectd.
Clam generate a false positive and rspamd assign VIRUS_FOUND (2000).
Sending error: “5.7.1 This message does not meet our delivery requirements”.

I have applied a workadound by adding this:
allow_encrypted = true; # Ignora gli archivi/protetti da password
rules = {
allow_xls_encrypted {
extensions = [“xls”];
action = “no_action”; #
}

}

to my
/opt/mailcow-dockerized/data/conf/rspamd/local.d/antivirus.conf
Now it’s work but I would like to know if there is a safer solution, avoiding Clamav reporting the false positive.
My version:
2024-06c
Thanks!