Postfix recipient_delimiter not working with catchall defined

short description

The postfix recipient_delimiter is not working if a catchall for the email domain is defined.

If no catchall is enabled the recipient_delimiter works as expected.

Example

Mail account test@domain.tld

Catchall for @domain.tld to mail account catchall@domain.tld

Mail send to test+something@domain.tld is delivered to catchall@domain.tld

correct behaviour

Mail send to test+something@domain.tld should be delivered to test@domain.tld

environment

Server OS: ubuntu

Server OS version: 20.04.1 LTS (focal)

ISPConfig version: 3.2dev20201006

Postfix version: 3.4.13-0ubuntu1

additional information

In ISPConfig 3.1.x this worked as expected.

Some difference between 3.1 and 3.2 maybe related to this are changes in the files /etc/postfix/mysql-virtual_*.cf which may result in different sql queries executed by postfix.