Program: 13592
Project: 13592
Buggy source:
private void setupObservers(){
  mViewModel.getSitePlugins().observe(this,new Observer<List<SitePluginModel>>(){
    @Override public void onChanged(    @Nullable final List<SitePluginModel> sitePlugins){
      if (mListType == PluginListType.SITE) {
        reloadPlugins();
      }
    }
  }
);
  mViewModel.getNewPlugins().observe(this,new Observer<List<WPOrgPluginModel>>(){
    @Override public void onChanged(    @Nullable final List<WPOrgPluginModel> newPlugins){
      if (mListType == PluginListType.NEW) {
        reloadPlugins();
      }
    }
  }
);
  mViewModel.getPopularPlugins().observe(this,new Observer<List<WPOrgPluginModel>>(){
    @Override public void onChanged(    @Nullable final List<WPOrgPluginModel> popularPlugins){
      if (mListType == PluginListType.POPULAR) {
        reloadPlugins();
      }
    }
  }
);
  mViewModel.getSearchResults().observe(this,new Observer<List<WPOrgPluginModel>>(){
    @Override public void onChanged(    @Nullable final List<WPOrgPluginModel> popularPlugins){
      if (mListType == PluginListType.SEARCH) {
        reloadPlugins();
      }
    }
  }
);
  mViewModel.getNewPluginsListStatus().observe(this,new Observer<PluginBrowserViewModel.PluginListStatus>(){
    @Override public void onChanged(    @Nullable PluginBrowserViewModel.PluginListStatus listStatus){
      if (mListType == PluginListType.NEW) {
        showProgress(listStatus == PluginBrowserViewModel.PluginListStatus.FETCHING || listStatus == PluginBrowserViewModel.PluginListStatus.LOADING_MORE);
      }
    }
  }
);
  mViewModel.getPopularPluginsListStatus().observe(this,new Observer<PluginBrowserViewModel.PluginListStatus>(){
    @Override public void onChanged(    @Nullable PluginBrowserViewModel.PluginListStatus listStatus){
      if (mListType == PluginListType.POPULAR) {
        showProgress(listStatus == PluginBrowserViewModel.PluginListStatus.FETCHING || listStatus == PluginBrowserViewModel.PluginListStatus.LOADING_MORE);
      }
    }
  }
);
  mViewModel.getSearchPluginsListStatus().observe(this,new Observer<PluginBrowserViewModel.PluginListStatus>(){
    @Override public void onChanged(    @Nullable PluginBrowserViewModel.PluginListStatus listStatus){
      if (mListType == PluginListType.SEARCH) {
        showProgress(listStatus == PluginBrowserViewModel.PluginListStatus.FETCHING || listStatus == PluginBrowserViewModel.PluginListStatus.LOADING_MORE);
        if (listStatus == PluginBrowserViewModel.PluginListStatus.ERROR) {
          ToastUtils.showToast(getActivity(),R.string.plugin_search_error);
        }
        showEmptyView(mViewModel.shouldShowEmptySearchResultsView());
      }
    }
  }
);
  mViewModel.getLastUpdatedWpOrgPluginSlug().observe(this,new Observer<String>(){
    @Override public void onChanged(    @Nullable String slug){
      if (!TextUtils.isEmpty(slug) && mRecycler.getAdapter() != null) {
        showProgress(true);
        ((PluginListAdapter)mRecycler.getAdapter()).reloadPluginWithSlug(slug);
      }
    }
  }
);
}

Fixed version (ground truth):
private void setupObservers(){
  mViewModel.getSitePlugins().observe(this,new Observer<List<SitePluginModel>>(){
    @Override public void onChanged(    @Nullable final List<SitePluginModel> sitePlugins){
      if (mListType == PluginListType.SITE) {
        reloadPlugins();
      }
    }
  }
);
  mViewModel.getNewPlugins().observe(this,new Observer<List<WPOrgPluginModel>>(){
    @Override public void onChanged(    @Nullable final List<WPOrgPluginModel> newPlugins){
      if (mListType == PluginListType.NEW) {
        reloadPlugins();
      }
    }
  }
);
  mViewModel.getPopularPlugins().observe(this,new Observer<List<WPOrgPluginModel>>(){
    @Override public void onChanged(    @Nullable final List<WPOrgPluginModel> popularPlugins){
      if (mListType == PluginListType.POPULAR) {
        reloadPlugins();
      }
    }
  }
);
  mViewModel.getSearchResults().observe(this,new Observer<List<WPOrgPluginModel>>(){
    @Override public void onChanged(    @Nullable final List<WPOrgPluginModel> popularPlugins){
      if (mListType == PluginListType.SEARCH) {
        reloadPlugins();
      }
    }
  }
);
  mViewModel.getNewPluginsListStatus().observe(this,new Observer<PluginBrowserViewModel.PluginListStatus>(){
    @Override public void onChanged(    @Nullable PluginBrowserViewModel.PluginListStatus listStatus){
      if (mListType == PluginListType.NEW) {
        showProgress(listStatus == PluginBrowserViewModel.PluginListStatus.FETCHING || listStatus == PluginBrowserViewModel.PluginListStatus.LOADING_MORE);
      }
    }
  }
);
  mViewModel.getPopularPluginsListStatus().observe(this,new Observer<PluginBrowserViewModel.PluginListStatus>(){
    @Override public void onChanged(    @Nullable PluginBrowserViewModel.PluginListStatus listStatus){
      if (mListType == PluginListType.POPULAR) {
        showProgress(listStatus == PluginBrowserViewModel.PluginListStatus.FETCHING || listStatus == PluginBrowserViewModel.PluginListStatus.LOADING_MORE);
      }
    }
  }
);
  mViewModel.getSearchPluginsListStatus().observe(this,new Observer<PluginBrowserViewModel.PluginListStatus>(){
    @Override public void onChanged(    @Nullable PluginBrowserViewModel.PluginListStatus listStatus){
      if (mListType == PluginListType.SEARCH) {
        showProgress(listStatus == PluginBrowserViewModel.PluginListStatus.FETCHING || listStatus == PluginBrowserViewModel.PluginListStatus.LOADING_MORE);
        if (listStatus == PluginBrowserViewModel.PluginListStatus.ERROR) {
          ToastUtils.showToast(getActivity(),R.string.plugin_search_error);
        }
        showEmptyView(mViewModel.shouldShowEmptySearchResultsView());
      }
    }
  }
);
  mViewModel.getLastUpdatedWpOrgPluginSlug().observe(this,new Observer<String>(){
    @Override public void onChanged(    @Nullable String slug){
      if (!TextUtils.isEmpty(slug) && mRecycler.getAdapter() != null) {
        ((PluginListAdapter)mRecycler.getAdapter()).reloadPluginWithSlug(slug);
      }
    }
  }
);
}