diff --git a/client/src/components/Planner/usePlacesSidebar.test.tsx b/client/src/components/Planner/usePlacesSidebar.test.tsx
index 3ec5b6ca2..07aaf764b 100644
--- a/client/src/components/Planner/usePlacesSidebar.test.tsx
+++ b/client/src/components/Planner/usePlacesSidebar.test.tsx
@@ -188,12 +188,9 @@ describe('usePlacesSidebar filtering', () => {
     expect(names()).toEqual(['GPX Track']);
   });
 
-  it('FE-PLANNER-PSHOOK-008: a tracks filter without any track falls back to "all"', async () => {
-    seedStore(useTripStore, { placesFilter: 'tracks' });
-    render(<Host {...makeProps({ places: [buildPlace({ name: 'Plain Spot' })] })} />);
-    await waitFor(() => expect(useTripStore.getState().placesFilter).toBe('all'));
-    expect(names()).toEqual(['Plain Spot']);
-  });
+  // FE-PLANNER-PSHOOK-008 (a tracks filter without any track falls back to "all")
+  // moved to useTripPlanner (FE-TP-HOOK-177): the fallback now lives there, so it
+  // also holds while no places list is mounted.
 
   it('FE-PLANNER-PSHOOK-009: a category filter keeps only that category', () => {
     const tagged = buildPlace({ name: 'Tagged', category_id: 4 });
diff --git a/client/src/components/Planner/usePlacesSidebar.ts b/client/src/components/Planner/usePlacesSidebar.ts
index cc5843c07..6a6c9abf5 100644
--- a/client/src/components/Planner/usePlacesSidebar.ts
+++ b/client/src/components/Planner/usePlacesSidebar.ts
@@ -259,8 +259,9 @@ export function usePlacesSidebar(props: PlacesSidebarProps) {
   const pickFilter = (next: PlacesFilter) => { setFilter(next); setSelectedIds(new Set()) }
 
   // Alle geplanten Ort-IDs abrufen (einem Tag zugewiesen)
+  // Whether to offer the "Tracks" tab. useTripPlanner moves the filter back to
+  // "all" once the last track is gone, whichever screen is in front.
   const hasTracks = useMemo(() => places.some(p => p.route_geometry), [places])
-  useEffect(() => { if (filter === 'tracks' && !hasTracks) setFilter('all') }, [hasTracks, filter])
 
   const plannedIds = useMemo(
     () => plannedPlaceIds({ assignments, accommodations, reservations }),
diff --git a/client/src/mobile/screens/trip/places/MPlacesBrowser.tsx b/client/src/mobile/screens/trip/places/MPlacesBrowser.tsx
index db8d6a21b..fb9fe9252 100644
--- a/client/src/mobile/screens/trip/places/MPlacesBrowser.tsx
+++ b/client/src/mobile/screens/trip/places/MPlacesBrowser.tsx
@@ -63,10 +63,9 @@ export default function MPlacesBrowser({ planner, shell }: MPlacesBrowserProps)
     if (shell.browseFromEdit) setFilter('unplanned')
   }, [shell.browseFromEdit, setFilter])
 
+  // Whether to offer the "Tracks" chip; useTripPlanner moves the filter back to
+  // "all" once the last track is gone.
   const hasTracks = useMemo(() => places.some(p => p.route_geometry), [places])
-  useEffect(() => {
-    if (filter === 'tracks' && !hasTracks) setFilter('all')
-  }, [filter, hasTracks, setFilter])
 
   // A hotel is linked through its stay and a venue through its booking; neither is
   // ever dragged onto a day, and the pool used to call both unplanned (#2072).
diff --git a/client/src/pages/tripPlanner/useTripPlanner.test.tsx b/client/src/pages/tripPlanner/useTripPlanner.test.tsx
index c4ea889cc..33cf5c255 100644
--- a/client/src/pages/tripPlanner/useTripPlanner.test.tsx
+++ b/client/src/pages/tripPlanner/useTripPlanner.test.tsx
@@ -1,4 +1,4 @@
-// FE-TP-HOOK-001 to FE-TP-HOOK-176
+// FE-TP-HOOK-001 to FE-TP-HOOK-177
 import React from 'react'
 import { renderHook, act, waitFor } from '@testing-library/react'
 import { TranslationProvider } from '../../i18n/TranslationContext'
@@ -644,6 +644,23 @@ describe('useTripPlanner — map derivations', () => {
     expect(result.current.mapPlaces.map(p => p.id)).toEqual([2])
   })
 
+  it('FE-TP-HOOK-177: losing the last track moves the "Tracks" filter back to all', async () => {
+    // The phone map has no places list mounted, so this hook is what keeps the
+    // filter from pointing at a pool no control offers any more.
+    seedTrip({
+      places: [geo(1), geo(2, { route_geometry: '[[1,2]]' })],
+      placesFilter: 'tracks',
+    })
+
+    const { result } = await renderPlanner()
+    expect(useTripStore.getState().placesFilter).toBe('tracks')
+
+    act(() => { useTripStore.setState({ places: [geo(1)] }) })
+
+    await waitFor(() => expect(useTripStore.getState().placesFilter).toBe('all'))
+    expect(result.current.mapPlaces.map(p => p.id)).toEqual([1])
+  })
+
   it('FE-TP-HOOK-027: the category filter honours the uncategorized bucket', async () => {
     seedTrip({
       places: [geo(1, { category_id: 3 }), geo(2, { category_id: null })],
diff --git a/client/src/pages/tripPlanner/useTripPlanner.ts b/client/src/pages/tripPlanner/useTripPlanner.ts
index bc65e3ac5..25b85e4c4 100644
--- a/client/src/pages/tripPlanner/useTripPlanner.ts
+++ b/client/src/pages/tripPlanner/useTripPlanner.ts
@@ -768,6 +768,17 @@ export function useTripPlanner() {
     })
   }, [places, placesCategoryFilter, placesFilter, placesRatingFilter, assignments, expandedDayIds, selectedDayId, days, tripAccommodations, reservations, compactUnplanned])
 
+  // The "Tracks" pool is only offered while a place carries a track. When the last
+  // one goes (deleted here or by a collaborator), fall back to "all" — here, because
+  // this hook is mounted whatever is on screen: the lists that used to do it are not
+  // mounted while the phone map is in front, and the map would sit empty under a
+  // "Tracks" filter no control offers any more.
+  const setPlacesFilter = useTripStore((s) => s.setPlacesFilter)
+  const hasTracks = useMemo(() => places.some(p => p.route_geometry), [places])
+  useEffect(() => {
+    if (placesFilter === 'tracks' && !hasTracks) setPlacesFilter('all')
+  }, [placesFilter, hasTracks, setPlacesFilter])
+
   const { route, routeWalking, routeSegments, routeVias, routeInfo, setRoute, setRouteInfo, updateRouteForDay } = useRouteCalculation({ assignments } as any, selectedDayId, routeShown, routeProfile, tripAccommodations)
   // Road trip mode already draws the whole trip its own way, so the overview stands
   // down there rather than drawing a second set of lines over it.
diff --git a/client/tests/unit/mobile/trip/MPlacesBrowser.test.tsx b/client/tests/unit/mobile/trip/MPlacesBrowser.test.tsx
index a2e352d6a..a2eebd252 100644
--- a/client/tests/unit/mobile/trip/MPlacesBrowser.test.tsx
+++ b/client/tests/unit/mobile/trip/MPlacesBrowser.test.tsx
@@ -124,11 +124,11 @@ describe('MPlacesBrowser', () => {
     expect(screen.queryByText('Louvre')).not.toBeInTheDocument()
   })
 
-  it('FE-MOB-PBROW-007: hides the tracks chip and falls back to all when the last track is gone', () => {
-    seedStore(useTripStore, { placesFilter: 'tracks' })
+  // The fall back to "all" once the last track is gone lives in useTripPlanner
+  // (FE-TP-HOOK-177), which stays mounted while this browser is not.
+  it('FE-MOB-PBROW-007: hides the tracks chip when no place carries a track', () => {
     renderBrowser(makePlanner({ places: [LOUVRE, EIFFEL] } as Partial<TripPlanner>))
     expect(screen.queryByRole('button', { name: 'places.filterTracks' })).not.toBeInTheDocument()
-    expect(useTripStore.getState().placesFilter).toBe('all')
     expect(screen.getByText('places.count:2')).toBeInTheDocument()
   })