iOS game freezes on startup

Hello there, I have a problem. I have an iOS game and it freezes/crashed when I run it in xcode without any error note, just blue "(lldb)". I tried debugging from scripts in unity and found out only awake function on the first script in execution order (a singleton script in my case) is called. The weird thing is that this happens only if I uncheck "development build" in build settings. If "development build" is checked, there are absolutely no problems in XCode and game runs just fine. I'll be super glad for any answers.