diff --git a/changelog.d/20682_consistent_annotation_suppression.fix.md b/changelog.d/20682_consistent_annotation_suppression.fix.md
new file mode 100644
index 0000000000000..2fe545e56991a
--- /dev/null
+++ b/changelog.d/20682_consistent_annotation_suppression.fix.md
@@ -0,0 +1,3 @@
+Fixes an issue where annotation suppression failed when `log_namespace` was set to `true` in kubernetes_logs.
+
+authors: ifuryst
diff --git a/lib/vector-core/src/config/mod.rs b/lib/vector-core/src/config/mod.rs
index 985f994c1813a..ce4bf6f237702 100644
--- a/lib/vector-core/src/config/mod.rs
+++ b/lib/vector-core/src/config/mod.rs
@@ -427,11 +427,14 @@ impl LogNamespace {
         value: impl Into<Value>,
     ) {
         match self {
-            LogNamespace::Vector => {
-                log.metadata_mut()
-                    .value_mut()
-                    .insert(path!(source_name).concat(metadata_key), value);
-            }
+            LogNamespace::Vector => match legacy_key {
+                None => { /* don't insert */ }
+                _ => {
+                    log.metadata_mut()
+                        .value_mut()
+                        .insert(path!(source_name).concat(metadata_key), value);
+                }
+            },
             LogNamespace::Legacy => match legacy_key {
                 None => { /* don't insert */ }
                 Some(LegacyKey::Overwrite(key)) => {
diff --git a/src/sources/kubernetes_logs/pod_metadata_annotator.rs b/src/sources/kubernetes_logs/pod_metadata_annotator.rs
index 1cb8ca5728b40..05df9b3a044b7 100644
--- a/src/sources/kubernetes_logs/pod_metadata_annotator.rs
+++ b/src/sources/kubernetes_logs/pod_metadata_annotator.rs
@@ -990,6 +990,64 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_suppress_annotation_fields() {
+        let cases = vec![
+            (
+                FieldsSpec {
+                    container_id: OptionalTargetPath::none(),
+                    ..FieldsSpec::default()
+                },
+                ContainerStatus {
+                    container_id: Some("container_id_foo".to_owned()),
+                    image_id: "test_image_id".to_owned(),
+                    ..ContainerStatus::default()
+                },
+                {
+                    let mut log = LogEvent::default();
+                    log.insert(
+                        event_path!("kubernetes", "container_image_id"),
+                        "test_image_id",
+                    );
+                    log
+                },
+                LogNamespace::Legacy,
+            ),
+            (
+                FieldsSpec {
+                    container_id: OptionalTargetPath::none(),
+                    ..FieldsSpec::default()
+                },
+                ContainerStatus {
+                    container_id: Some("container_id_foo".to_owned()),
+                    image_id: "test_image_id".to_owned(),
+                    ..ContainerStatus::default()
+                },
+                {
+                    let mut log = LogEvent::default();
+                    log.insert(
+                        metadata_path!("kubernetes_logs", "container_image_id"),
+                        "test_image_id",
+                    );
+                    log
+                },
+                LogNamespace::Vector,
+            ),
+        ];
+        for (fields_spec, container_status, expected, log_namespace) in cases.into_iter() {
+            let mut log = LogEvent::default();
+            annotate_from_container_status(
+                &mut log,
+                &fields_spec,
+                &container_status,
+                log_namespace,
+            );
+            println!("{:?}", log);
+            println!("{:?}", expected);
+            assert_eq!(log, expected);
+        }
+    }
+
     #[test]
     fn test_annotate_from_container() {
         let cases = vec![