Blank screen and small pauses when offline

[nerform]

Hello,

I have double din with android in my car. I have synced some playlist for offline access and every once in a while when I open spotify (after device boot up) the screen is blank. I can see the menu icon in the left corner but when I click it the menu is blank and the main area where songs use to show in is blank. After I connect the device to wifi with internet access and restart spotify everything is back to normal. 
Why is that and can you guys fix it?

From few days now I have another problem. Every song I play (in offline mode) get paused every 30-50 seconds for few milliseconds. I tried with other music apps and radio and this is not happening there so it seems like spotify is doing something. After updating spotify to the latest version (few days ago) this problem disappeared but not I back again.

Spotify is a great product but is becoming painful to use ...