Fix #6762: Do not overwrite some status attributes in reducer (#6767)

app/javascript/mastodon/reducers/statuses.js

@@ -56,6 +56,9 @@ const normalizeStatus = (state, status) => {
     normalStatus.reblog = status.reblog.id;
   }
 
+  // Only calculate these values when status first encountered
+  // Otherwise keep the ones already in the reducer
+  if (!state.has(status.id)) {
     const searchContent = [status.spoiler_text, status.content].join('\n\n').replace(/<br\s*\/?>/g, '\n').replace(/<\/p><p>/g, '\n\n');
 
     const emojiMap = normalStatus.emojis.reduce((obj, emoji) => {
@@ -67,6 +70,7 @@ const normalizeStatus = (state, status) => {
     normalStatus.contentHtml  = emojify(normalStatus.content, emojiMap);
     normalStatus.spoilerHtml  = emojify(escapeTextContentForBrowser(normalStatus.spoiler_text || ''), emojiMap);
     normalStatus.hidden       = normalStatus.sensitive;
+  }
 
   return state.update(status.id, ImmutableMap(), map => map.mergeDeep(fromJS(normalStatus)));
 };