I am running version 1.2.3, which is the Beta FW described here:
The icons indicate that you are not connected to WiFi, which is why you cannot control the T-Stat via the App. The Snowflake looking icon indicates you have set the T-Stat for AC only and Not Heat or Auto.
Now, if you want the Beta FW for the T-Stat to see if it fixes your issue go here and register for Beta Testing:
Then load the App and when you enter it, go to Account, About, Beta Program, Click Edit in the Top Right, and then select T-Stat save all changes and back out to the Account Menu. You can then go to Firmware Update and the T-Stat FW should show up. you can also go to the T-Stat, Settings, Device Info and then go to Firmware and perform the update.
Note: Not sure you need to download the Beta App to do this, you may be able to do it once you sign up for the Beta Progra,.