Properly use "saveDeferred" only in instances where "commit" is called later.

src/Controller/Api/Stations/OnDemand/ListAction.php

@@ -84,7 +84,7 @@ final class ListAction extends AbstractSearchableListAction
             $item->set($playlistIds);
             $item->expiresAfter(600);
 
-            $this->psr6Cache->saveDeferred($item);
+            $this->psr6Cache->save($item);
         }
 
         return $item->get();

src/Controller/Api/Stations/Requests/ListAction.php

@@ -130,7 +130,7 @@ final class ListAction extends AbstractSearchableListAction
             $item->set($ids);
             $item->expiresAfter(600);
 
-            $this->psr6Cache->saveDeferred($item);
+            $this->psr6Cache->save($item);
         }
 
         return $item->get();

src/Controller/Api/Stations/ScheduleAction.php

@@ -96,7 +96,7 @@ final class ScheduleAction
                 );
                 $cacheItem->expiresAfter(600);
 
-                $this->psr6Cache->saveDeferred($cacheItem);
+                $this->psr6Cache->save($cacheItem);
             }
 
             $events = $cacheItem->get();
@@ -117,7 +117,7 @@ final class ScheduleAction
                 $cacheItem->set($this->scheduleRepo->getUpcomingSchedule($station, $now));
                 $cacheItem->expiresAfter(60);
 
-                $this->psr6Cache->saveDeferred($cacheItem);
+                $this->psr6Cache->save($cacheItem);
             }
 
             $events = $cacheItem->get();

src/Entity/Repository/ListenerRepository.php

@@ -210,6 +210,9 @@ final class ListenerRepository extends Repository
         } finally {
             @unlink($tempCsvPath);
         }
+
+        $this->deviceDetector->saveCache();
+        $this->ipGeolocation->saveCache();
     }
 
     private function batchAddRow(Entity\Station $station, Client $client): array

src/Service/DeviceDetector.php

@@ -52,4 +52,9 @@ final class DeviceDetector
 
         return $deviceResult;
     }
+
+    public function saveCache(): bool
+    {
+        return $this->psr6Cache->commit();
+    }
 }

src/Service/Dropbox/OAuthAdapter.php

@@ -77,7 +77,7 @@ final class OAuthAdapter implements RefreshableTokenProvider
             }
 
             $cacheItem->expiresAfter(600);
-            $this->psr6Cache->saveDeferred($cacheItem);
+            $this->psr6Cache->save($cacheItem);
         }
 
         return $cacheItem->get();

src/Service/IpGeolocation.php

@@ -114,4 +114,9 @@ final class IpGeolocation
             ];
         }
     }
+
+    public function saveCache(): bool
+    {
+        return $this->psr6Cache->commit();
+    }
 }