diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0d80bc71..8f23b16ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,9 @@ to include examples, links to docs, or any other relevant information.
 
 ### Fixed
 
+- Worker heartbeats reported through a `MetricBuffer` now include correct task-slot and poller
+  counts. Previously those labelled gauges always reported `0` when buffered metrics were
+  configured, hiding the slots and pollers from the Workers UI.
 - `StrandsPlugin` now disables Botocore retries for its default Bedrock model so
   model request retries are handled exclusively by Temporal.
 - `temporalio.contrib.openai_agents` now honors the `retry-after-ms` and
diff --git a/temporalio/bridge/sdk-core b/temporalio/bridge/sdk-core
index 85b71d7ec..7d95a31ed 160000
--- a/temporalio/bridge/sdk-core
+++ b/temporalio/bridge/sdk-core
@@ -1 +1 @@
-Subproject commit 85b71d7ecd4f2bf677fa1cee17f3fbc1ab10f1b9
+Subproject commit 7d95a31ed9ee1c9fd01553951b24809514e55d66