diff --git a/backend/src/data/loops/expiringMutesLoop.ts b/backend/src/data/loops/expiringMutesLoop.ts
index a3b5b7e8..9efc5708 100644
--- a/backend/src/data/loops/expiringMutesLoop.ts
+++ b/backend/src/data/loops/expiringMutesLoop.ts
@@ -52,8 +52,12 @@ export async function runExpiringMutesLoop() {
 export function registerExpiringMute(mute: Mute) {
   clearExpiringMute(mute);
 
+  if (mute.expires_at === null) {
+    return;
+  }
+
   console.log("[EXPIRING MUTES LOOP] Registering new expiring mute");
-  const remaining = Math.max(0, moment.utc(mute.expires_at!).diff(moment.utc()));
+  const remaining = Math.max(0, moment.utc(mute.expires_at).diff(moment.utc()));
   if (remaining > LOOP_INTERVAL) {
     return;
   }
diff --git a/backend/src/data/loops/expiringTempbansLoop.ts b/backend/src/data/loops/expiringTempbansLoop.ts
index a28f91e6..67d32d8e 100644
--- a/backend/src/data/loops/expiringTempbansLoop.ts
+++ b/backend/src/data/loops/expiringTempbansLoop.ts
@@ -53,7 +53,7 @@ export function registerExpiringTempban(tempban: Tempban) {
   clearExpiringTempban(tempban);
 
   console.log("[EXPIRING TEMPBANS LOOP] Registering new expiring tempban");
-  const remaining = Math.max(0, moment.utc(tempban.expires_at!).diff(moment.utc()));
+  const remaining = Math.max(0, moment.utc(tempban.expires_at).diff(moment.utc()));
   if (remaining > LOOP_INTERVAL) {
     return;
   }
diff --git a/backend/src/data/loops/expiringVCAlertsLoop.ts b/backend/src/data/loops/expiringVCAlertsLoop.ts
index b987d71a..20036ecf 100644
--- a/backend/src/data/loops/expiringVCAlertsLoop.ts
+++ b/backend/src/data/loops/expiringVCAlertsLoop.ts
@@ -49,7 +49,7 @@ export function registerExpiringVCAlert(alert: VCAlert) {
   clearExpiringVCAlert(alert);
 
   console.log("[EXPIRING VCALERTS LOOP] Registering new expiring vcalert");
-  const remaining = Math.max(0, moment.utc(alert.expires_at!).diff(moment.utc()));
+  const remaining = Math.max(0, moment.utc(alert.expires_at).diff(moment.utc()));
   if (remaining > LOOP_INTERVAL) {
     return;
   }
diff --git a/backend/src/data/loops/upcomingRemindersLoop.ts b/backend/src/data/loops/upcomingRemindersLoop.ts
index 1f34e99f..6c1449a4 100644
--- a/backend/src/data/loops/upcomingRemindersLoop.ts
+++ b/backend/src/data/loops/upcomingRemindersLoop.ts
@@ -48,7 +48,7 @@ export function registerUpcomingReminder(reminder: Reminder) {
   clearUpcomingReminder(reminder);
 
   console.log("[REMINDERS LOOP] Registering new upcoming reminder");
-  const remaining = Math.max(0, moment.utc(reminder.remind_at!).diff(moment.utc()));
+  const remaining = Math.max(0, moment.utc(reminder.remind_at).diff(moment.utc()));
   if (remaining > LOOP_INTERVAL) {
     return;
   }
diff --git a/backend/src/data/loops/upcomingScheduledPostsLoop.ts b/backend/src/data/loops/upcomingScheduledPostsLoop.ts
index 51da1bae..57ae896b 100644
--- a/backend/src/data/loops/upcomingScheduledPostsLoop.ts
+++ b/backend/src/data/loops/upcomingScheduledPostsLoop.ts
@@ -47,8 +47,12 @@ export async function runUpcomingScheduledPostsLoop() {
 export function registerUpcomingScheduledPost(post: ScheduledPost) {
   clearUpcomingScheduledPost(post);
 
+  if (post.post_at === null) {
+    return;
+  }
+
   console.log("[SCHEDULED POSTS LOOP] Registering new upcoming scheduled post");
-  const remaining = Math.max(0, moment.utc(post.post_at!).diff(moment.utc()));
+  const remaining = Math.max(0, moment.utc(post.post_at).diff(moment.utc()));
   if (remaining > LOOP_INTERVAL) {
     return;
   }