diff --git a/src/features/schedule/components/ScheduleFilter.test.tsx b/src/features/schedule/components/ScheduleFilter.test.tsx
index 81b048c1..a2403a4a 100644
--- a/src/features/schedule/components/ScheduleFilter.test.tsx
+++ b/src/features/schedule/components/ScheduleFilter.test.tsx
@@ -470,9 +470,28 @@ describe("ScheduleFilter – validation per TZ §4.1.9.4", () => {
     expect(screen.queryByTestId("schedule-date-clear")).toBeNull();
     expect(screen.queryByTestId("schedule-return-date-clear")).toBeNull();
   });
+
+  it("clears stale return dates when return flights toggle changes", () => {
+    render(
+      <ScheduleFilter
+        initialDeparture="SVO"
+        initialArrival="LED"
+        initialDateFrom="20260601"
+        initialDateTo="20260607"
+        initialReturnFlights={true}
+        initialReturnDateFrom="20260608"
+        initialReturnDateTo="20260614"
+      />,
+    );
+
+    expect(screen.queryByTestId("schedule-return-date-clear")).toBeTruthy();
+    fireEvent.click(screen.getByTestId("schedule-return-flights").querySelector("input")!);
+    fireEvent.click(screen.getByTestId("schedule-return-flights").querySelector("input")!);
+    expect(screen.queryByTestId("schedule-return-date-clear")).toBeNull();
+  });
 });
 
-describe("ScheduleFilter – repeated-submit lock", () => {
+describe("ScheduleFilter – submit parity", () => {
   beforeEach(() => {
     vi.clearAllMocks();
     scheduleCalendarMock.days = [];
@@ -482,7 +501,7 @@ describe("ScheduleFilter – repeated-submit lock", () => {
     _sliderOnChanges.length = 0;
   });
 
-  it("keeps identical resubmits locked but allows an immediate changed search", () => {
+  it("allows immediate repeated submits like Angular", () => {
     render(
       <ScheduleFilter
         initialDeparture="SVO"
@@ -494,7 +513,10 @@ describe("ScheduleFilter – repeated-submit lock", () => {
 
     fireEvent.submit(screen.getByTestId("search-form"));
     expect(mockNavigate).toHaveBeenCalledTimes(1);
-    expect((screen.getByTestId("search-submit") as HTMLButtonElement).disabled).toBe(true);
+    expect((screen.getByTestId("search-submit") as HTMLButtonElement).disabled).toBe(false);
+
+    fireEvent.submit(screen.getByTestId("search-form"));
+    expect(mockNavigate).toHaveBeenCalledTimes(2);
 
     fireEvent.change(screen.getByTestId("schedule-arrival-input"), {
       target: { value: "KUF" },
@@ -502,7 +524,7 @@ describe("ScheduleFilter – repeated-submit lock", () => {
     expect((screen.getByTestId("search-submit") as HTMLButtonElement).disabled).toBe(false);
 
     fireEvent.submit(screen.getByTestId("search-form"));
-    expect(mockNavigate).toHaveBeenCalledTimes(2);
+    expect(mockNavigate).toHaveBeenCalledTimes(3);
     expect(mockNavigate).toHaveBeenLastCalledWith(
       "/ru-ru/schedule/route/SVO-KUF-20260601-20260607",
     );
diff --git a/src/features/schedule/components/ScheduleFilter.tsx b/src/features/schedule/components/ScheduleFilter.tsx
index 1b1ba477..8c0987ca 100644
--- a/src/features/schedule/components/ScheduleFilter.tsx
+++ b/src/features/schedule/components/ScheduleFilter.tsx
@@ -251,47 +251,6 @@ export const ScheduleFilter: FC<ScheduleFilterProps> = ({
     [returnAvailableDays, returnCalendarLoaded, scheduleMinDate, scheduleMaxDate],
   );
 
-  // §4.1.11 — submit button locked for 30 seconds after each search.
-  // The 30-second constant is intentionally hardcoded (not configurable).
-  const [submitLock, setSubmitLock] = useState<{ until: number; key: string } | null>(null);
-  const [nowTs, setNowTs] = useState(() => Date.now());
-  useEffect(() => {
-    if (!submitLock || nowTs >= submitLock.until) return;
-    const id = setTimeout(() => setNowTs(Date.now()), 1000);
-    return () => clearTimeout(id);
-  }, [submitLock, nowTs]);
-  const formSearchKey = useMemo(
-    () =>
-      JSON.stringify({
-        departure: departure.trim().toUpperCase(),
-        arrival: arrival.trim().toUpperCase(),
-        dateFrom: dateRange[0] ? dateToYyyymmdd(dateRange[0]) : "",
-        dateTo: dateRange[1] ? dateToYyyymmdd(dateRange[1]) : "",
-        timeFrom: timeRange[0],
-        timeTo: timeRange[1],
-        directOnly,
-        returnFlights,
-        returnDateFrom: returnDateRange[0] ? dateToYyyymmdd(returnDateRange[0]) : "",
-        returnDateTo: returnDateRange[1] ? dateToYyyymmdd(returnDateRange[1]) : "",
-        returnTimeFrom: returnTimeRange[0],
-        returnTimeTo: returnTimeRange[1],
-      }),
-    [
-      departure,
-      arrival,
-      dateRange,
-      timeRange,
-      directOnly,
-      returnFlights,
-      returnDateRange,
-      returnTimeRange,
-    ],
-  );
-  const isSubmitLocked = useMemo(
-    () => Boolean(submitLock && nowTs < submitLock.until && submitLock.key === formSearchKey),
-    [submitLock, nowTs, formSearchKey],
-  );
-
   // TZ §4.1.9.4 Table 16: when the outbound range moves forward such
   // that the already-chosen return starts before the new outbound
   // dateTo, blank the return picker and any coupled error so the user
@@ -393,7 +352,6 @@ export const ScheduleFilter: FC<ScheduleFilterProps> = ({
   const handleSubmit = useCallback(
     (e: FormEvent<HTMLFormElement>) => {
       e.preventDefault();
-      if (isSubmitLocked) return;
       const dep = departure.trim().toUpperCase();
       const arr = arrival.trim().toUpperCase();
       if (!dep || !arr) return;
@@ -516,10 +474,6 @@ export const ScheduleFilter: FC<ScheduleFilterProps> = ({
           : {}),
         searchExecuted: true,
       });
-      // Lock submit for 30 seconds (§4.1.11 — hardcoded, not configurable)
-      const submittedAt = Date.now();
-      setSubmitLock({ until: submittedAt + 30_000, key: formSearchKey });
-      setNowTs(submittedAt);
       void navigate(`/${locale}/${url}`);
     },
     [
@@ -533,8 +487,6 @@ export const ScheduleFilter: FC<ScheduleFilterProps> = ({
       returnTimeRange,
       navigate,
       locale,
-      isSubmitLocked,
-      formSearchKey,
     ],
   );
 
@@ -691,7 +643,11 @@ export const ScheduleFilter: FC<ScheduleFilterProps> = ({
               <input
                 type="checkbox"
                 checked={returnFlights}
-                onChange={(e) => setReturnFlights(e.target.checked)}
+                onChange={(e) => {
+                  setReturnFlights(e.target.checked);
+                  setReturnDateRange([null, null]);
+                  setReturnBeforeOutboundError(null);
+                }}
               />
               <span>{t("SHARED.RETURN_FLIGHT_VIEW")}</span>
             </label>
@@ -794,8 +750,6 @@ export const ScheduleFilter: FC<ScheduleFilterProps> = ({
               type="submit"
               className="search-button"
               data-testid="search-submit"
-              disabled={isSubmitLocked}
-              aria-disabled={isSubmitLocked}
             >
               <span>{t("SHARED.SCHEDULES_VIEW")}</span>
             </button>
diff --git a/src/features/schedule/components/ScheduleSearchPage.scss b/src/features/schedule/components/ScheduleSearchPage.scss
index e9f3c57d..eeeaee28 100644
--- a/src/features/schedule/components/ScheduleSearchPage.scss
+++ b/src/features/schedule/components/ScheduleSearchPage.scss
@@ -40,11 +40,11 @@
     }
   }
 
-  // §4.1.11 — block filter/tabs/breadcrumbs while loading
+  // Angular parity: loading blocks only the sticky results controls.
+  // The sidebar filter stays interactive so users can correct criteria
+  // while the previous request is still in-flight.
   &[data-searching="true"] {
-    .page-layout__left,
-    .page-layout__sticky,
-    .page-layout__breadcrumbs {
+    .page-layout__sticky {
       pointer-events: none;
       opacity: 0.6;
     }
diff --git a/tests/e2e/schedule-filter-resubmit.spec.ts b/tests/e2e/schedule-filter-resubmit.spec.ts
index 5d0c6809..bdc5479c 100644
--- a/tests/e2e/schedule-filter-resubmit.spec.ts
+++ b/tests/e2e/schedule-filter-resubmit.spec.ts
@@ -15,7 +15,7 @@ test.describe("Schedule results filter", () => {
     const submit = page.getByTestId("search-submit");
     await expect(submit).toBeEnabled();
     await submit.click();
-    await expect(submit).toBeDisabled();
+    await expect(submit).toBeEnabled();
 
     await page.getByTestId("swap-cities-button").click();