diff --git a/release_notes/41-release-notes.adoc b/release_notes/41-release-notes.adoc
index cb225fdbb7fc..e665838a4acd 100644
--- a/release_notes/41-release-notes.adoc
+++ b/release_notes/41-release-notes.adoc
@@ -12,7 +12,7 @@ toc::[]
 [options="header"]
 |====
 |{product-title-short} version |Released on
-|`4.1` |26 Jun 2023
+|`4.1` |29 Jun 2023
 |====
 
 [id="about-this-release_{context}"]
@@ -125,7 +125,7 @@ With this release, you can test a new runtime collection method that no longer r
 :FeatureName: The `CORE_BPF` collection method
 include::snippets/technology-preview.adoc[leveloffset=+1]
 
-This feature is available for testing on the x86_64 architecture and is based on the new Linux BPF features, including CO-RE (Compile Once-Run Everywhere). To enable it, set the value of the `collector.collectionMethod` parameter of your backed-up cluster to `CORE_BPF`.
+This feature is available for testing on `x86_64` and `s390x` architectures and is based on the new Linux BPF features, including CO-RE (Compile Once-Run Everywhere). To enable it, set the value of the `collector.collectionMethod` parameter of your backed-up cluster to `CORE_BPF`.
 
 The new method offers several advantages:
 
@@ -393,6 +393,7 @@ When Central was reinstalled, the password of the new secret didn't match the on
 [id="known-issues_{context}"]
 === Known issues
 
+* For secured clusters on {ibm-z} and {ibm-linuxone} that are running {ocp} 4.10, Collector fails to start when the default configuration is used. As a workaround, enable the xref:../release_notes/41-release-notes.adoc#new-collection-method-based-on-bpf-co-re-technology-preview_release-notes-41[CORE_BPF collection method] (Technology Preview). (ROX-18058)
 * For secured clusters on {ibm-z} and {ibm-linuxone}, there is a known issue with the Process Group Identifier (GID) in the `ProcessesService` API where the reported GID can be incorrect and display a value of `-1`. This affects process details provided through the `/v1/processes/deployment/{deploymentId}` API endpoint and other APIs that provide process signal information.
 +
 This can lead to inaccuracies or inconsistencies in the reported GID. This issue does not impact the {product-title-short} portal or policy criteria. Also, when using ePBF on {ibm-z} and {ibm-linuxone}, the GID process might be invalid (`-1`) for processes that terminate shortly after execution. There is currently no workaround for this issue. (ROX-17459)