diff --git a/apps/web/src/reader/CbzReader.tsx b/apps/web/src/reader/CbzReader.tsx
index 7e82fc3..d1de4f4 100644
--- a/apps/web/src/reader/CbzReader.tsx
+++ b/apps/web/src/reader/CbzReader.tsx
@@ -115,13 +115,12 @@ export function CbzReader({
   const scheduleInitialVisibleSync = useCallback(
     (stage: HTMLElement) => {
       clearVerticalInitialSync();
-      if (!(stage.scrollHeight > stage.clientHeight)) return;
       verticalInitialSyncAttemptRef.current = 0;
 
       const sync = () => {
         verticalInitialSyncFrameRef.current = null;
         if (verticalUserScrollRef.current || verticalInitialSyncDoneRef.current) return;
-        if (verticalTrackingReadyRef.current && stage.scrollTop > Math.max(32, stage.clientHeight * 0.5)) {
+        if (verticalTrackingReadyRef.current && stage.scrollHeight > stage.clientHeight && stage.scrollTop > Math.max(32, stage.clientHeight * 0.5)) {
           commitVisiblePage(stage, true);
         }
         verticalInitialSyncAttemptRef.current += 1;
diff --git a/apps/web/src/reader/PdfReader.tsx b/apps/web/src/reader/PdfReader.tsx
index d4b53ec..8996bc1 100644
--- a/apps/web/src/reader/PdfReader.tsx
+++ b/apps/web/src/reader/PdfReader.tsx
@@ -211,13 +211,12 @@ export function PdfReader({ url, page, backHref, zoom, mode, onPageCommit, onCon
   const scheduleInitialVisibleSync = useCallback(
     (stage: HTMLElement) => {
       clearVerticalInitialSync();
-      if (!(stage.scrollHeight > stage.clientHeight)) return;
       verticalInitialSyncAttemptRef.current = 0;
 
       const sync = () => {
         verticalInitialSyncFrameRef.current = null;
         if (verticalUserScrollRef.current || verticalInitialSyncDoneRef.current) return;
-        if (verticalTrackingReadyRef.current && stage.scrollTop > Math.max(32, stage.clientHeight * 0.5)) {
+        if (verticalTrackingReadyRef.current && stage.scrollHeight > stage.clientHeight && stage.scrollTop > Math.max(32, stage.clientHeight * 0.5)) {
           commitVisiblePage(stage, true);
         }
         verticalInitialSyncAttemptRef.current += 1;