diff --git a/web/libs/editor/src/mixins/PersistentState.js b/web/libs/editor/src/mixins/PersistentState.js
index 3b8039aa0c6c..1960a059d269 100644
--- a/web/libs/editor/src/mixins/PersistentState.js
+++ b/web/libs/editor/src/mixins/PersistentState.js
@@ -26,7 +26,11 @@ const PersistentStateMixin = types
 
     storeValues() {
       const key = self.persistentValuesKey;
-      const obj = { ...self.persistentFingerprint, values: self.persistentValues };
+      const fingerprint = self.persistentFingerprint;
+
+      // no stable identity (e.g. preview without a task) — don't persist
+      if (!Object.values(fingerprint).every((value) => value !== undefined)) return;
+      const obj = { ...fingerprint, values: self.persistentValues };
 
       localStorage.setItem(key, JSON.stringify(obj));
     },
@@ -35,8 +39,10 @@ const PersistentStateMixin = types
       const stored = JSON.parse(localStorage.getItem(self.persistentValuesKey) || "{}");
 
       if (!stored) return;
-      if (!Object.keys(self.persistentFingerprint).every((key) => stored[key] === self.persistentFingerprint[key]))
-        return;
+      const fingerprint = self.persistentFingerprint;
+
+      if (!Object.values(fingerprint).every((value) => value !== undefined)) return;
+      if (!Object.keys(fingerprint).every((key) => stored[key] === fingerprint[key])) return;
 
       const values = stored.values || {};
 
diff --git a/web/libs/editor/src/tags/object/TimeSeries.jsx b/web/libs/editor/src/tags/object/TimeSeries.jsx
index 4148830817d9..c6ee115290b8 100644
--- a/web/libs/editor/src/tags/object/TimeSeries.jsx
+++ b/web/libs/editor/src/tags/object/TimeSeries.jsx
@@ -479,7 +479,12 @@ const Model = types
     },
 
     get persistentFingerprint() {
-      return { task: getRoot(self).task?.id };
+      // tag and overviewwidth invalidate the stored view on config change
+      return {
+        task: getRoot(self).task?.id,
+        tag: self.name,
+        overviewwidth: self.overviewwidth,
+      };
     },
 
     states() {
diff --git a/web/libs/editor/src/tags/object/__tests__/TimeSeries.test.js b/web/libs/editor/src/tags/object/__tests__/TimeSeries.test.js
index 3ebcdaf4ebae..24e0ed405378 100644
--- a/web/libs/editor/src/tags/object/__tests__/TimeSeries.test.js
+++ b/web/libs/editor/src/tags/object/__tests__/TimeSeries.test.js
@@ -1302,6 +1302,87 @@ describe("TimeSeries persistentValues, dataSlices, and panView no-op", () => {
     expect(fp).toHaveProperty("task");
   });
 
+  it("persistentFingerprint includes tag name and overviewwidth", () => {
+    const model = TimeSeriesModel.create(
+      {
+        name: "ts1",
+        value: "$timeseries",
+        timecolumn: "time",
+        overviewwidth: "50%",
+        children: [],
+      },
+      mockEnv,
+    );
+    const fp = model.persistentFingerprint;
+    expect(fp.tag).toBe("ts1");
+    expect(fp.overviewwidth).toBe("50%");
+  });
+
+  it("does not store values when there is no task id", () => {
+    localStorage.clear();
+    const model = TimeSeriesModel.create(
+      {
+        name: "timeseries",
+        value: "$timeseries",
+        timecolumn: "time",
+        children: [],
+      },
+      mockEnv,
+    );
+    model.setData({ time: [0, 100], value: [1, 2] });
+    model.updateTR([10, 90]);
+    model.storeValues();
+    expect(localStorage.getItem(model.persistentValuesKey)).toBeNull();
+  });
+
+  it("does not restore stored view when overviewwidth changed", () => {
+    localStorage.clear();
+    const MockStoreWithTask = types
+      .model({ timeseries: TimeSeriesModel })
+      .volatile(() => ({ task: { id: 1, dataObj: {} } }));
+
+    const m1 = TimeSeriesModel.create(
+      { name: "ts", value: "$timeseries", timecolumn: "time", overviewwidth: "25%", children: [] },
+      mockEnv,
+    );
+    MockStoreWithTask.create({ timeseries: m1 }, mockEnv);
+    m1.setData({ time: [0, 100], value: [1, 2] });
+    m1.updateTR([0, 25]);
+    m1.storeValues();
+
+    const m2 = TimeSeriesModel.create(
+      { name: "ts", value: "$timeseries", timecolumn: "time", overviewwidth: "100%", children: [] },
+      mockEnv,
+    );
+    MockStoreWithTask.create({ timeseries: m2 }, mockEnv);
+    m2.restoreValues();
+    expect(m2.brushRange.length).toBe(0);
+  });
+
+  it("restores stored view for the same task, tag and config", () => {
+    localStorage.clear();
+    const MockStoreWithTask = types
+      .model({ timeseries: TimeSeriesModel })
+      .volatile(() => ({ task: { id: 1, dataObj: {} } }));
+
+    const m1 = TimeSeriesModel.create(
+      { name: "ts", value: "$timeseries", timecolumn: "time", overviewwidth: "25%", children: [] },
+      mockEnv,
+    );
+    MockStoreWithTask.create({ timeseries: m1 }, mockEnv);
+    m1.setData({ time: [0, 100], value: [1, 2] });
+    m1.updateTR([0, 25]);
+    m1.storeValues();
+
+    const m2 = TimeSeriesModel.create(
+      { name: "ts", value: "$timeseries", timecolumn: "time", overviewwidth: "25%", children: [] },
+      mockEnv,
+    );
+    MockStoreWithTask.create({ timeseries: m2 }, mockEnv);
+    m2.restoreValues();
+    expect([...m2.brushRange]).toEqual([0, 25]);
+  });
+
   it("dataSlices returns array of slices", () => {
     const model = TimeSeriesModel.create(
       {