diff --git a/A00_Common/design/design_pipeline_page.ts b/A00_Common/design/design_pipeline_page.ts
index cf56a56db..5aacf0107 100644
--- a/A00_Common/design/design_pipeline_page.ts
+++ b/A00_Common/design/design_pipeline_page.ts
@@ -375,8 +375,10 @@ function createPagePipeline(
   const finishDrop = async (record: PipelineRunRecord): Promise<string> => {
     // 뒤 차례(B06 cross 등)에 밀림 · 초안은 그대로 버려짐 — 마지막 차례 끝에서 되돌림(B05 와 같게)
     const pushed = record.outcome === "dropped" && record.generation !== pipe.generation;
-    if (pushed && dropPending && !pipe.input("route"))
-      return (lastRun as Promise<PipelineRunRecord>).then(finishDrop);
+    if (pushed && dropPending && !pipe.input("route")) {
+      const next = await (lastRun as Promise<PipelineRunRecord>);
+      if (next !== record) return finishDrop(next); // 같은 기록 = 끝난 차례 · 되받으면 끝없는 고리(298-3)
+    }
     dropPending = false;
     const routeId = pageSaved.canonRouteId();
     const stations = pipe.output("ground")?.stations ?? [];
diff --git a/resources/tester/helper_298_3_finishdrop_loop.cjs b/resources/tester/helper_298_3_finishdrop_loop.cjs
new file mode 100644
index 000000000..85348a63c
--- /dev/null
+++ b/resources/tester/helper_298_3_finishdrop_loop.cjs
@@ -0,0 +1,63 @@
+/* 298-3 노선 [저장] 뒤 렌더러 멈춤 단위검증 헬퍼 — `design_pipeline_page.ts` 의 `finishDrop` 본문을
+ * 그대로 떼어 트랜스파일 · 둘레 칸은 가짜. 밀린 버림 기록(dropped · 옛 차례)을 넘기고 lastRun 이 같은 기록을
+ * 되돌려 줄 때 finishDrop 이 몇 번 불리는지 · 끝나는지. 결과 JSON 을 stdout 으로.
+ */
+const fs = require("fs");
+const path = require("path");
+const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+
+const ROOT = path.join(__dirname, "..", "..");
+const code = fs.readFileSync(
+  path.join(ROOT, "A00_Common", "design", "design_pipeline_page.ts"),
+  "utf8",
+);
+const begin = code.indexOf("const finishDrop = async");
+const end = code.indexOf("\n  };", begin) + 5;
+if (begin < 0 || end < begin) throw new Error("finishDrop 못 찾음");
+const body = code
+  .slice(begin, end)
+  .replace("const finishDrop = async", "const finishDropInner = async");
+
+const harness = `
+let calls = 0;
+const finishDrop = (record: any): Promise<string> => {
+  calls += 1;
+  if (calls > 50) return Promise.reject(new Error("loop"));
+  return finishDropInner(record);
+};
+${body}
+return { finishDrop, calls: () => calls };
+`;
+const js = ts
+  .transpileModule(`(function () {${harness}})`, {
+    compilerOptions: { target: ts.ScriptTarget.ES2022 },
+  })
+  .outputText.replace(/^"use strict";/, "");
+
+const record = { outcome: "dropped", generation: 3 };
+const pipe = { generation: 5, input: () => null, output: () => null };
+let released = 0;
+const scope = {
+  pipe,
+  dropPending: true,
+  lastRun: Promise.resolve(record), // 이미 끝난 같은 차례 기록
+  pageSaved: { canonRouteId: () => 7, adoptCanon() {} },
+  held: null,
+  options: {},
+  heldSectionDetail: () => null,
+  stationDiff: () => null,
+  adoptAfterDrop() {},
+  publisher: { shown: async () => undefined },
+  releaseWhenQuiet: async () => void (released += 1),
+};
+const names = Object.keys(scope);
+const make = new Function(
+  "scope",
+  `let { ${names.join(", ")} } = scope;\nreturn ${js.trim().replace(/;$/, "")}();`,
+);
+const { finishDrop, calls } = make(scope);
+
+finishDrop(record).then(
+  (why) => console.log(JSON.stringify({ calls: calls(), why, released, record })),
+  (error) => console.log(JSON.stringify({ calls: calls(), error: String(error), released })),
+);
diff --git a/resources/tester/test_298_3_finishdrop_loop.py b/resources/tester/test_298_3_finishdrop_loop.py
new file mode 100644
index 000000000..2e7981dce
--- /dev/null
+++ b/resources/tester/test_298_3_finishdrop_loop.py
@@ -0,0 +1,25 @@
+"""298-3 노선 [저장] 뒤 렌더러 멈춤 — 밀린 버림 기록을 lastRun 이 같은 기록으로 되돌려 줘도 finishDrop 은 한 번.
+
+./venv/Scripts/python.exe -m pytest resources/tester/test_298_3_finishdrop_loop.py -q
+"""
+
+from __future__ import annotations
+
+import json
+import subprocess
+from pathlib import Path
+
+HELPER = Path(__file__).resolve().parent / "helper_298_3_finishdrop_loop.cjs"
+
+
+def test_같은_기록_되받기_고리_없음() -> None:
+    run = subprocess.run(  # noqa: S603 — 고정 실행 파일
+        ["node", str(HELPER)], capture_output=True, text=True, encoding="utf-8", timeout=30
+    )
+    assert run.returncode == 0, run.stderr
+    out = json.loads(run.stdout)
+    assert "error" not in out, out
+    assert out["calls"] == 1
+    assert out["why"] == "dropped"  # 밀린 기록 그대로 · 되돌림 없음
+    assert out["released"] == 1
+    assert out["record"]["restored"] is False