diff --git a/.forgejo/workflows/update-flake-hashes.yml b/.forgejo/workflows/update-flake-hashes.yml
index 44bf7402b..e572046f1 100644
--- a/.forgejo/workflows/update-flake-hashes.yml
+++ b/.forgejo/workflows/update-flake-hashes.yml
@@ -1,7 +1,6 @@
 name: Update flake hashes
 
 on:
-  workflow_dispatch:
   pull_request:
     paths:
       - "Cargo.lock"
diff --git a/changelog.d/2226.bugfix.md b/changelog.d/2226.bugfix.md
new file mode 100644
index 000000000..1407c9f3c
--- /dev/null
+++ b/changelog.d/2226.bugfix.md
@@ -0,0 +1 @@
+Sliding sync responses no longer include an empty room account data entry for every room in a list's range. Contributed by @eleboucher.
diff --git a/src/api/client/sync/v5.rs b/src/api/client/sync/v5.rs
index 2148f3ece..d169509a6 100644
--- a/src/api/client/sync/v5.rs
+++ b/src/api/client/sync/v5.rs
@@ -855,15 +855,21 @@ where
 		};
 
 		if body.extensions.account_data.enabled == Some(true) {
-			response.extensions.account_data.rooms.insert(
-				room_id.to_owned(),
-				services
+			let room_account_data: Vec<_> = services
+				.account_data
+				.changes_since(Some(room_id), sender_user, Some(*roomsince), Some(next_batch))
+				.ready_filter_map(|e| extract_variant!(e, AnyRawAccountDataEvent::Room))
+				.collect()
+				.await;
+
+			// An empty entry makes clients treat the room as updated.
+			if !room_account_data.is_empty() {
+				response
+					.extensions
 					.account_data
-					.changes_since(Some(room_id), sender_user, Some(*roomsince), Some(next_batch))
-					.ready_filter_map(|e| extract_variant!(e, AnyRawAccountDataEvent::Room))
-					.collect()
-					.await,
-			);
+					.rooms
+					.insert(room_id.to_owned(), room_account_data);
+			}
 		}
 
 		let last_privateread_update = services
diff --git a/src/service/rooms/event_handler/fetch_and_handle_outliers.rs b/src/service/rooms/event_handler/fetch_and_handle_outliers.rs
index b4285be37..3813e10db 100644
--- a/src/service/rooms/event_handler/fetch_and_handle_outliers.rs
+++ b/src/service/rooms/event_handler/fetch_and_handle_outliers.rs
@@ -155,7 +155,12 @@ impl super::Service {
 				.prev_events()
 				.stream()
 				.fold(0_u8, |i, event_id| async move {
-					if self.services.timeline.pdu_exists(event_id).await {
+					if self
+						.services
+						.timeline
+						.non_outlier_pdu_exists(event_id)
+						.await
+					{
 						i
 					} else {
 						i.expected_add(1)