diff --git a/app/Member/FilterScope.php b/app/Member/FilterScope.php
index c39d6799..2112c48f 100644
--- a/app/Member/FilterScope.php
+++ b/app/Member/FilterScope.php
@@ -2,8 +2,11 @@
 
 namespace App\Member;
 
+use App\Activity;
+use App\Group;
 use App\Invoice\BillKind;
 use App\Lib\Filter;
+use App\Subactivity;
 use Illuminate\Support\Collection;
 use Laravel\Scout\Builder;
 use Spatie\LaravelData\Attributes\MapInputName;
@@ -139,6 +142,9 @@ class FilterScope extends Filter
      */
     protected function possibleValuesForMembership(array $membership): Collection
     {
+        $membership['group_ids'] = count($membership['group_ids']) === 0 ? Group::pluck('id')->toArray() : $membership['group_ids'];
+        $membership['activity_ids'] = count($membership['activity_ids']) === 0 ? Activity::pluck('id')->toArray() : $membership['activity_ids'];
+        $membership['subactivity_ids'] = count($membership['subactivity_ids']) === 0 ? Subactivity::pluck('id')->toArray() : $membership['subactivity_ids'];
         return $this->combinations($membership['group_ids'], $membership['activity_ids'], $membership['subactivity_ids'])
             ->map(fn ($combination) => collect($combination)->implode('|'));
     }
diff --git a/tests/EndToEnd/MemberIndexTest.php b/tests/EndToEnd/MemberIndexTest.php
index 639d0eee..4ac08fc1 100644
--- a/tests/EndToEnd/MemberIndexTest.php
+++ b/tests/EndToEnd/MemberIndexTest.php
@@ -199,6 +199,26 @@ class MemberIndexTest extends EndToEndTestCase
         ]])->assertInertiaCount('data.data', 1);
     }
 
+    public function testGroupOfMembershipsFilterCanBeEmpty(): void
+    {
+        $this->withoutExceptionHandling()->login()->loginNami();
+        $mitglied = Activity::factory()->create();
+        $woelfling = Subactivity::factory()->create();
+        $group = Group::factory()->create();
+        Member::factory()->defaults()->has(Membership::factory()->for($mitglied)->for($woelfling)->for($group))->create();
+
+        sleep(1);
+        $this->callFilter('member.index', ['memberships' => [
+            ['group_ids' => [], 'activity_ids' => [$mitglied->id], 'subactivity_ids' => [$woelfling->id]],
+        ]])->assertInertiaCount('data.data', 1);
+        $this->callFilter('member.index', ['memberships' => [
+            ['group_ids' => [$group->id], 'activity_ids' => [], 'subactivity_ids' => [$woelfling->id]],
+        ]])->assertInertiaCount('data.data', 1);
+        $this->callFilter('member.index', ['memberships' => [
+            ['group_ids' => [$group->id], 'activity_ids' => [$mitglied->id], 'subactivity_ids' => []],
+        ]])->assertInertiaCount('data.data', 1);
+    }
+
     public function testItFiltersForSearchButNotForPayments(): void
     {
         $this->withoutExceptionHandling()->login()->loginNami();