diff --git a/src/browser/history/HistoricalCaptureReply.ts b/src/browser/history/HistoricalCaptureReply.ts
index 1adad77f90..b2f93710c9 100644
--- a/src/browser/history/HistoricalCaptureReply.ts
+++ b/src/browser/history/HistoricalCaptureReply.ts
@@ -158,5 +158,6 @@ const excludeNormalizedNumbers = (
   projection.numeric_literals = projection.numeric_literals.filter(
     (number) => !excluded.has(number.pointer),
   );
-  projection.redactions.push(...redaction.redactions);
+  for (const excludedValue of redaction.redactions)
+    projection.redactions.push(excludedValue);
 };
diff --git a/tests/boundary/browser/historicalCaptureWideNumbers.test.ts b/tests/boundary/browser/historicalCaptureWideNumbers.test.ts
new file mode 100644
index 0000000000..dc9fa86cad
--- /dev/null
+++ b/tests/boundary/browser/historicalCaptureWideNumbers.test.ts
@@ -0,0 +1,119 @@
+import { createHash } from "node:crypto";
+import { readFile, writeFile } from "node:fs/promises";
+import { join } from "node:path";
+import { expect, it, onTestFinished } from "vitest";
+
+import { HistoricalCaptureDecoder } from "../../../src/browser/history/HistoricalCaptureDecoder.js";
+import { MITMPROXY_CAPTURE_PROVIDER_IDENTITY } from "../../../src/browser/history/CaptureProviderIdentities.js";
+import { decodeHarCapture } from "../../../src/browser/history/HarCapture.js";
+import { inspectWebNetworkCaptureInputSchema } from "../../../src/domain/webNetworkCapture.js";
+import { historicalHar } from "../../fixtures/historicalHar.js";
+import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
+
+it("retains every exclusion in a wide native-number reply through the owned decoder", async () => {
+  const root = await createTestTempDirectory("rea-wide-native-numbers-");
+  const capturePath = join(root, "capture.mitm");
+  const original = "source-owned native decoder input";
+  await writeFile(capturePath, original);
+  const count = 150_000;
+  const payload = decodeHarCapture(JSON.stringify(historicalHar()), []);
+  payload.decoder = MITMPROXY_CAPTURE_PROVIDER_IDENTITY;
+  payload.container.reported = { normalized: 1e-7, ordinary: "container" };
+  payload.container.numeric_literals = [
+    { pointer: "/normalized", producer_type: "float", literal: "1e-07" },
+  ];
+  const record = payload.records[0]!;
+  record.location = { kind: "byte-range", offset: 0, bytes: original.length };
+  // Python's native projection retains 1e-07; the reply owner must also check
+  // the JavaScript spelling 1e-7 before retaining Evidence.
+  record.reported = {
+    values: Array.from({ length: count }, () => 1e-7),
+    ordinary: 42,
+    request: { headers: [["authorization", null]] },
+  };
+  record.binary_fields = [];
+  const existingRedaction = {
+    pointer: "/request/headers/0/1",
+    reason: "transport-credential" as const,
+  };
+  record.redactions = [existingRedaction];
+  record.numeric_literals = Array.from({ length: count }, (_, index) => ({
+    pointer: `/values/${String(index)}`,
+    producer_type: "float" as const,
+    literal: "1e-07",
+  }));
+  const ordinary = {
+    pointer: "/ordinary",
+    producer_type: "integer" as const,
+    literal: "42",
+  };
+  record.numeric_literals.push(ordinary);
+  const replyPath = join(root, "producer-reply.json");
+  await writeFile(replyPath, JSON.stringify({ ok: true, value: payload }));
+  const decoder = new HistoricalCaptureDecoder(
+    [
+      {
+        format: "mitmproxy",
+        identity: MITMPROXY_CAPTURE_PROVIDER_IDENTITY,
+        command: async (_, runtime) => ({
+          command: process.execPath,
+          arguments: [
+            "-e",
+            "require('node:fs').copyFileSync(process.argv[1], process.argv[2])",
+            replyPath,
+            join(runtime, "reply.json"),
+          ],
+        }),
+      },
+    ],
+    process.env,
+  );
+  onTestFinished(() => decoder.close());
+  for (const marked of [false, true]) {
+    const result = await decoder.inspect(
+      inspectWebNetworkCaptureInputSchema.parse({
+        capture_path: capturePath,
+        format: "mitmproxy",
+        sensitive_values: marked ? ["1e-7"] : [],
+      }),
+    );
+    if (!result.ok) throw result.error;
+    expect(result.value.artifact.sha256).toBe(
+      createHash("sha256").update(original).digest("hex"),
+    );
+    expect(result.value.container.reported).toEqual({
+      normalized: marked ? null : 1e-7,
+      ordinary: "container",
+    });
+    expect(result.value.container.numeric_literals).toEqual(
+      marked ? [] : payload.container.numeric_literals,
+    );
+    const retained = result.value.records[0]!;
+    expect(retained.location).toEqual(record.location);
+    expect(retained.reported).toMatchObject({
+      ordinary: 42,
+      request: { headers: [["authorization", null]] },
+    });
+    const values = (retained.reported as { values: unknown[] }).values;
+    expect(values).toHaveLength(count);
+    expect(values.every((value) => value === (marked ? null : 1e-7))).toBe(
+      true,
+    );
+    expect(retained.numeric_literals).toEqual(
+      marked ? [ordinary] : record.numeric_literals,
+    );
+    expect(retained.redactions[0]).toEqual(existingRedaction);
+    expect(retained.redactions).toHaveLength(marked ? count + 1 : 1);
+    if (marked)
+      expect(
+        retained.redactions
+          .slice(1)
+          .every(
+            (redaction, index) =>
+              redaction.pointer === `/values/${String(index)}` &&
+              redaction.reason === "explicit-sensitive-value",
+          ),
+      ).toBe(true);
+    expect(await readFile(capturePath, "utf8")).toBe(original);
+  }
+});