diff --git a/CHANGELOG.next.asciidoc b/CHANGELOG.next.asciidoc
index 15898dd9547b..5f3e62942c3b 100644
--- a/CHANGELOG.next.asciidoc
+++ b/CHANGELOG.next.asciidoc
@@ -26,6 +26,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Improve stats API {pull}27963[27963]
 - Enable IMDSv2 support for `add_cloud_metadata` processor on AWS. {issue}22101[22101] {pull}28285[28285]
 - Update kubernetes.namespace from keyword to group field and add name, labels, annotations, uuid as its fields {pull}27917[27917]
+- Previously, RE2 and thus Golang had a bug where `(|a)*` matched more characters than `(|a)+`. To stay consistent with PCRE, the bug was fixed. Configurations that rely on the old, buggy behaviour has to be adjusted. See more about Golang bug: https://github.com/golang/go/issues/46123 {pull}27543[27543]
 
 *Auditbeat*