iRFR App Freezing

Hi

I'm having an issue where when using the App it seems to Freeze and the only way to fix it is to lock the Iphone then unlock and it works again. 

Not sure Where I should post this so I thought here would be best. Not sure if its a bug or Iphone issue however After posting in the facebook group appears it could be a bug. 

Link to Facebook Thread on Eos Programmers group: https://www.facebook.com/groups/etceosprogrammers/posts/4169225579832116/?comment_id=4172148752873132&notif_id=1627424780747880&notif_t=group_comment&ref=notif