diff --git a/docs/CHANGELOG.asciidoc b/docs/CHANGELOG.asciidoc
index 8b3ef150811e6..4570966afacb5 100644
--- a/docs/CHANGELOG.asciidoc
+++ b/docs/CHANGELOG.asciidoc
@@ -104,7 +104,12 @@ include::upgrade-notes.asciidoc[]
 [[release-notes-8.18.4]]
 == {kib} 8.18.4
 
-The 8.18.4 release includes the following fixes.
+The 8.18.4 release includes the following known issues and fixes.
+
+[float]
+[[known-issues-8.18.4]]
+=== Known issues
+include::CHANGELOG.asciidoc[tag=known-issue-230275]
 
 [float]
 [[fixes-v8.18.4]]
@@ -139,7 +144,7 @@ Search::
 [[release-notes-8.18.3]]
 == {kib} 8.18.3
 
-The 8.18.3 release includes the following fixes.
+The 8.18.3 release includes the following known issues and fixes.
 
 IMPORTANT: The 8.18.3 release contains fixes for potential security vulnerabilities. Check our link:https://discuss.elastic.co/c/announcements/security-announcements/31[security advisory for more details].
 
@@ -150,6 +155,17 @@ include::CHANGELOG.asciidoc[tag=known-issue-227976]
 include::CHANGELOG.asciidoc[tag=known-issue-1508]
 include::CHANGELOG.asciidoc[tag=known-issue-2088]
 
+// tag::known-issue-230275[]
+.Issues with rules occur when xpack.alerting.rules.run.alerts.max is set to a value greater than 5000.
+[%collapsible]
+====
+*Details* +
+If you've set `xpack.alerting.rules.run.alerts.max` to a value greater than `5000`, you will encounter `Result window is too large` error messages when a maintenance window is active.
+*Workaround* +
+To mitigate the issue, set `xpack.alerting.rules.run.alerts.max` to a value equal to or less than `5000`.
+====
+// end::known-issue-230275[]
+
 [float]
 [[enhancement-v8.18.3]]
 === Enhancements