diff --git a/pyproject.toml b/pyproject.toml
index 1ec0fa068..ce818e0dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "validmind"
-version = "2.13.12"
+version = "2.13.13"
 description = "ValidMind Library"
 readme = "README.pypi.md"
 requires-python = ">=3.9,<3.15"
diff --git a/r/validmind/DESCRIPTION b/r/validmind/DESCRIPTION
index ecfae362e..618acbcef 100644
--- a/r/validmind/DESCRIPTION
+++ b/r/validmind/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: validmind
 Type: Package
 Title: Interface to the 'ValidMind' Platform
-Version: 2.13.12
+Version: 2.13.13
 Authors@R: c(person("Andres", "Rodriguez", role = c("aut", "cre","cph"),
                       email = "andres@validmind.ai"))
 Maintainer: Andres Rodriguez <andres@validmind.ai>
diff --git a/tests/test_results.py b/tests/test_results.py
index c0632bdd7..970197d6e 100644
--- a/tests/test_results.py
+++ b/tests/test_results.py
@@ -202,6 +202,35 @@ async def test_test_result_log_async(
         mock_test_result.assert_called_once()
         mock_metric.assert_called_once()
 
+    @patch("validmind.vm_models.result.result.update_metadata")
+    @patch("validmind.api_client.alog_test_result")
+    @patch("validmind.api_client.alog_figure")
+    async def test_test_result_log_async_pre_serializes_figures(
+        self, mock_figure, mock_test_result, mock_update_metadata
+    ):
+        """Figure PNGs are rendered before any upload request starts"""
+        mock_test_result.return_value = MockAsyncResponse(200, json={"cuid": "123"})
+        mock_update_metadata.return_value = None
+        cached_at_upload = []
+
+        async def record(figure):
+            cached_at_upload.append(figure._cached_png_bytes is not None)
+            return MockAsyncResponse(200, json={"cuid": "456"})
+
+        mock_figure.side_effect = record
+
+        fig, ax = plt.subplots()
+        ax.plot([1, 2], [3, 4])
+        test_result = TestResult(
+            result_id="test_1",
+            figures=[Figure(key="fig_1", figure=fig, ref_id="ref_1")],
+        )
+
+        await test_result.log_async(section_id="section_1", position=0)
+
+        self.assertEqual(cached_at_upload, [True])
+        plt.close(fig)
+
     def test_text_generation_result(self):
         """Test TextGenerationResult initialization and methods"""
         text_result = TextGenerationResult(
diff --git a/uv.lock b/uv.lock
index 24c4e25c3..28242e3b4 100644
--- a/uv.lock
+++ b/uv.lock
@@ -11268,7 +11268,7 @@ wheels = [
 
 [[package]]
 name = "validmind"
-version = "2.13.12"
+version = "2.13.13"
 source = { editable = "." }
 dependencies = [
     { name = "aiohttp", extra = ["speedups"] },
diff --git a/validmind/__version__.py b/validmind/__version__.py
index 896ad7fd7..dd7a8b6cd 100644
--- a/validmind/__version__.py
+++ b/validmind/__version__.py
@@ -1 +1 @@
-__version__ = "2.13.12"
+__version__ = "2.13.13"
diff --git a/validmind/vm_models/result/result.py b/validmind/vm_models/result/result.py
index e60533ba6..c7e38eca1 100644
--- a/validmind/vm_models/result/result.py
+++ b/validmind/vm_models/result/result.py
@@ -542,6 +542,18 @@ def serialize(self):
 
         return serialized
 
+    def _pre_serialize_figures(self):
+        """Render figure PNGs before any upload request starts.
+
+        Kaleido launches a Chromium per figure and blocks the event loop while it
+        runs. Rendering while uploads are in flight lets the request timeout
+        expire on them, and with older kaleido it conflicted with asyncio
+        outright (ZD-626). log() calls this outside the loop; log_async() calls
+        it too because the test-suite runner awaits log_async() directly.
+        """
+        for figure in self.figures or []:
+            figure.pre_serialize()
+
     async def log_async(
         self,
         section_id: str = None,
@@ -553,6 +565,8 @@ async def log_async(
         if self._is_scorer_result:
             return
 
+        self._pre_serialize_figures()
+
         tasks = []  # collect tasks to run in parallel (async)
 
         # Default empty dict if None
@@ -680,10 +694,7 @@ def log(  # noqa: C901
         if section_id:
             self._validate_section_id_for_block(section_id, position)
 
-        # Pre-serialize figures before entering async context to avoid conflicts
-        # between Plotly's kaleido library and asyncio event loops (ZD-626)
-        for figure in self.figures or []:
-            figure.pre_serialize()
+        self._pre_serialize_figures()
 
         run_async(
             self.log_async,