Componet item fails to load in template composer view frequently

1. Login to cms with admin user
2. Navigate to channel manger perspective
3. Click on channel, edit some properties then click on open channel
User is taken to preview mode of the site
4. click on Edit button on the top
User is taken to template composer view
5. Here drag & drop some components (try editing the items present in the page)
6. Switch between preview and edit views while editing the page using template composer

Actual issue - While repeating the "step 6" for >5 times, template composer components hangs. It just displays loading but nothing happens.
Workaround - Refreshing the page recovers the session and when user navigates to template composer view all components are shown.