We've been using Freshdesk for a while now to keep track of problems in our community and I'm pulling my hair out with agents using the iPhone app and seeing "null" appear in the "All Tickets" view. I just can't see anything relevant and important in the full ticket information that would display as "null". This doesn't occur in the Windows or Android versions of this view. I found one old report of this problem here but it wasn't clear whether this problem was identified or solved. I had them reinstall from the iTunes store, so they are up to whatever the store has, which is listed as v3.2.2. 

Screenshot attached.