Sophos XG Email Protections - high amount of false positive Blacklist

we are currently seeing high amounts of false positive blacklist hits, although none of the IPs is actually blacklisted.

SFOS 18.0.4 MR-4

here are a few examples, of IPs which not blacklisted but got rejected.

2021-10-14 11:53:51.020 [31787] ( []:36248 I=[x.x.x.x]:25 X=TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no F=<xxxx@xxx> rejected RCPT <jonathan.kunz@xxxxxx Sophos Anti Spam Engine has blocked this Email because the sender IP Address is blacklisted.

any one else ?

Edited TAGs
[edited by: emmosophos at 6:27 PM (GMT -7) on 14 Oct 2021]