Here is a list of issues that were fixed in this release - build PROD_2021_w40.

Issue Key Description
AVSUPPORT-64149 License page was showing incorrect result and count
AVSUPPORT-60860 Block List Rule failed to Quarantine matching emails
AVSUPPORT-63950, AVSUPPORT-64211 In some cases, when searching for sender domain in Mail Explorer, the domain was incorrectly marked as invalid.
AVSUPPORT-53339 A customer was experiencing false positives on internal SharePoint, being marked as phishing and quarantined.
AVSUPPORT-67066 DLP detection error caused not matching sensitive information
AVSUPPORT-66687 Recipients match "contains" condition in queries was not matching results correctly, while 'matches' did
DLP subject regex data that was configured on old UI was missing on new UI
AVSUPPORT-50147 Malicious attachment was not processed by the engine due to wrong initial classification