NSUserDefaults losing its keys & values when phone is rebooted but not unlocked

We are currently experiencing the following weird issue with our iPhone app. As the title says, NSUserDefaults is losing our custom keys and values when phone is rebooted but not unlocked, and this is happening on a very specific scenario. Context: We are using the NSUserDefaults in the app to store user data (e.g. username). Our app has Location enabled on Background Mode. We are experiencing thi

[fslasht]

再起動すると設定値がリセットされる原因コレか。りんごincは爆発汁！