diff --git a/app/src/main/java/com/todoroo/astrid/service/TaskDeleter.kt b/app/src/main/java/com/todoroo/astrid/service/TaskDeleter.kt
index 119fbbe22..d19f7699d 100644
--- a/app/src/main/java/com/todoroo/astrid/service/TaskDeleter.kt
+++ b/app/src/main/java/com/todoroo/astrid/service/TaskDeleter.kt
@@ -2,7 +2,10 @@ package com.todoroo.astrid.service
 
 import android.content.Context
 import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.NonCancellable
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.tasks.LocalBroadcastManager
 import org.tasks.caldav.VtodoCache
@@ -83,8 +86,11 @@ class TaskDeleter @Inject constructor(
     }
 
     private suspend fun cleanup(tasks: List<Long>) {
+        if (tasks.isEmpty()) {
+            return
+        }
+        notificationManager.cancel(tasks)
         tasks.forEach { task ->
-            notificationManager.cancel(task)
             locationDao.getGeofencesForTask(task).forEach {
                 locationDao.delete(it)
                 geofenceApi.update(it.place!!)
@@ -94,7 +100,11 @@ class TaskDeleter @Inject constructor(
                 userActivityDao.delete(it)
             }
         }
-        notificationManager.updateTimerNotification()
-        deletionDao.purgeDeleted()
+        coroutineScope {
+            launch(Dispatchers.IO) {
+                notificationManager.updateTimerNotification()
+                deletionDao.purgeDeleted()
+            }
+        }
     }
 }
diff --git a/app/src/main/java/org/tasks/notifications/NotificationManager.kt b/app/src/main/java/org/tasks/notifications/NotificationManager.kt
index ae1c9e2c7..84d5ebbf1 100644
--- a/app/src/main/java/org/tasks/notifications/NotificationManager.kt
+++ b/app/src/main/java/org/tasks/notifications/NotificationManager.kt
@@ -10,6 +10,8 @@ import com.todoroo.andlib.utility.AndroidUtilities
 import com.todoroo.andlib.utility.AndroidUtilities.preUpsideDownCake
 import com.todoroo.astrid.utility.Constants
 import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.launch
 import org.tasks.LocalBroadcastManager
 import org.tasks.R
 import org.tasks.data.dao.LocationDao
@@ -65,12 +67,20 @@ class NotificationManager @Inject constructor(
 
     @SuppressLint("CheckResult")
     suspend fun cancel(ids: Iterable<Long>) {
-        for (id in ids) {
-            notificationManager.cancel(id.toInt())
+        coroutineScope {
+            launch {
+                for (id in ids) {
+                    notificationManager.cancel(id.toInt())
+                }
+            }
         }
         queue.remove(ids)
         notificationDao.deleteAll(ids.toList())
-        notifyTasks(emptyList(), alert = false, nonstop = false, fiveTimes = false)
+        coroutineScope {
+            launch {
+                notifyTasks(emptyList(), alert = false, nonstop = false, fiveTimes = false)
+            }
+        }
     }
 
     suspend fun restoreNotifications(cancelExisting: Boolean) {