Hi GearWheel,
There could be several reasons for that, but you would have to elaborate...
This can maybe happen if you load a save generated under an older version, but it's been nearly a year that the game hasn't been updated, so I'll assume it's not that.
By the way, I suppose you play with version 1.4.06 on your phone right?
Have you edited your planet system (by yourself or by installing a planet pack)? Your saves (qks files)?
Thank you to give us all relevant information, that will greatly help us to understand what could happen.