Do not update chapter in case it has not been loaded yet (#612)

src/screens/Reader.tsx

@@ -182,6 +182,10 @@ export function Reader() {
     );
 
     const updateChapter = (patch: UpdateChapterPatchInput) => {
+        if (chapter === initialChapter) {
+            return;
+        }
+
         const getChapterIdToDelete = () => {
             const isAutoDeletionEnabled = !!patch.isRead && !!metadataSettings.deleteChaptersWhileReading;
             if (!isAutoDeletionEnabled || !mangaChapters) {
@@ -347,6 +351,10 @@ export function Reader() {
             return;
         }
 
+        if (chapter === initialChapter) {
+            return;
+        }
+
         // do not mutate the chapter, this will cause the page to jump around due to always scrolling to the last read page
         const updateLastPageRead = curPageDebounced !== -1;
         const updateIsRead = curPageDebounced === chapter.pageCount - 1;