diff --git a/backend/app/chat/job.py b/backend/app/chat/job.py
index b29b3a8c..438f6fba 100644
--- a/backend/app/chat/job.py
+++ b/backend/app/chat/job.py
@@ -1234,7 +1234,9 @@ async def startup(*, resume: bool | None = None, live: Any = None) -> dict[str,
             await session.commit()
         for turn_id in gone:
             turn_log.notify(turn_id)
-    for row in legacy:
+    # 老轮次（没有任务行）只在启动时整理：当班进程隔一会儿来的那一次（live.trust_mine）不碰——老页面开的轮次（不占锁的写入）
+    # 正在建图时也是这个样子
+    for row in [] if live.trust_mine else legacy:
         if turn_run_id(row):
             continue   # 有运行的老轮次：页面打开时请服务端接着收尾
         async with SessionLocal() as session:
diff --git a/backend/app/process/actions.py b/backend/app/process/actions.py
index 2b6a6393..f8c8e2b2 100644
--- a/backend/app/process/actions.py
+++ b/backend/app/process/actions.py
@@ -729,7 +729,8 @@ async def startup(*, live: Any = None) -> int:
     """启动时：上次进程没了的时候已经发出（sent）、还没拿到结果的动作收成结果未知，安排核实；结果未知却还没安排核实的
     （挂起之后、安排之前进程没了）补上。返回处理的条数。
 
-    多进程：所属的运行还在别的活着的进程里执行的不碰（那边正在发、正在等结果）。"""
+    多进程：所属的运行还在别的活着的进程里执行的不碰（那边正在发、正在等结果）；当班进程隔一会儿来的那一次只收拾停了两个租约
+    时长以上的。"""
     from app.cluster import state
     from app.db.models import Run
     from app.engine.runner import run_manager
@@ -741,6 +742,16 @@ async def startup(*, live: Any = None) -> int:
             ActionRecord.state.in_(("sent", "unknown")), ActionRecord.resolution.is_(None)))).all()
     ids = [action_id for action_id, run_id, status, owner in rows
            if not (status in ("running", "queued") and live.alive(owner, local=run_manager.is_active(run_id)))]
+    if live.trust_mine and ids:
+        # 当班进程隔一会儿来的那一次：刚挂起、执行它的进程正在安排核实的（收尾和安排核实之间）不碰，只收拾停了两个租约时长以上的
+        from datetime import timedelta
+
+        from app.cluster.workers import lease_s
+
+        floor = utcnow() - timedelta(seconds=2 * lease_s())
+        async with SessionLocal() as session:
+            ids = list((await session.execute(select(ActionRecord.id).where(
+                ActionRecord.id.in_(ids), ActionRecord.updated_at < floor))).scalars())
     for action_id in ids:
         try:
             await on_unknown(action_id)
diff --git a/backend/app/process/tasks.py b/backend/app/process/tasks.py
index e1690f40..a8bbbb4c 100644
--- a/backend/app/process/tasks.py
+++ b/backend/app/process/tasks.py
@@ -1027,14 +1027,15 @@ async def startup(*, live: Any = None) -> int:
     """启动时：存量的待审批补建 Task（派给任何人，幂等）；上次停在 resolving 的（判定之后、恢复之前进程没了）按 Approval
     的状态收拾——还在等的退回 pending、撤回那一票，已经交给引擎的记成已处理。返回补建的条数。
 
-    多进程：别的进程活着时，resolving 可能正是它在判定、恢复（几秒的事），只收拾停在 resolving 超过两个租约时长的。"""
+    多进程：别的进程活着时，resolving 可能正是它在判定、恢复（几秒的事），只收拾停在 resolving 超过两个租约时长的；当班进程隔一会儿
+    来的那一次（live.trust_mine）不论有没有别的进程都这样——本进程自己也可能正在判定。只有启动时、又没有别的进程的那一次全收拾。"""
     from datetime import timedelta
 
     from app.cluster import state
     from app.cluster.workers import lease_s
 
     live = live if live is not None else await state.current(fresh=True)
-    stale_before = utcnow() - timedelta(seconds=2 * lease_s()) if live.others else None
+    stale_before = utcnow() - timedelta(seconds=2 * lease_s()) if (live.others or live.trust_mine) else None
     async with SessionLocal() as session:
         orphans = list((await session.execute(
             select(Approval).outerjoin(Task, Task.approval_id == Approval.id)
diff --git a/backend/tests/test_task_resume_errors.py b/backend/tests/test_task_resume_errors.py
index db9b885e..721a7fd2 100644
--- a/backend/tests/test_task_resume_errors.py
+++ b/backend/tests/test_task_resume_errors.py
@@ -84,3 +84,32 @@ async def test_any_resume_error_puts_the_task_back(monkeypatch):
     out = await tasks.respond(task.id, ANN, decision="approve")
     assert out["resolved"] is True
     assert (await _wait(run.id, ("succeeded", "failed"))).status == "succeeded"
+
+
+async def test_the_periodic_takeover_leaves_a_task_that_is_being_resolved_alone(monkeypatch):
+    """复核 R-b2：当班进程隔一会儿的那一次接手（live.trust_mine）撞上一次正在判定、恢复的待办（停在 resolving 的那几秒），
+    单进程时也不能把它退回 pending、撤回那一票——只收拾停了两个租约时长以上的。启动时、又没有别的进程的那一次照旧全收拾。"""
+    from app.cluster.workers import Liveness
+
+    run = await run_manager.start(graph=FLOW, input_payload={"q": "x"})
+    await _wait(run.id, ("interrupted",))
+    task = await _pending(run.id)
+    real = run_manager.resume
+    reaped = asyncio.Event()
+
+    async def slow(*a, **k):
+        await asyncio.sleep(0.3)
+        await tasks.startup(live=Liveness().trusting())   # 判定到一半，当班进程来了一次
+        reaped.set()
+        return await real(*a, **k)
+
+    monkeypatch.setattr(run_manager, "resume", slow)
+    out = await tasks.respond(task.id, ANN, decision="approve")
+    assert reaped.is_set() and out["resolved"] is True
+    assert (await _wait(run.id, ("succeeded", "failed"))).status == "succeeded"
+    async with SessionLocal() as session:
+        row = await session.get(Task, task.id)
+        mine = (await session.execute(select(TaskAssignment).where(TaskAssignment.task_id == task.id))).scalars().all()
+    assert row.status == "resolved", row.status
+    assert mine and all(a.responded_by == "ann" and a.status not in ("pending", "withdrawn") for a in mine), \
+        [(a.status, a.responded_by) for a in mine]