Blueprint values overwritten


I am experiencing some weird problems with blueprint values lately. I have the springarm component of my characters overwritten. Each of my characters derives from AMyAbstractCharacter. Each of them replaces the standard spring arm with my own overwritten version. Because every character has different camera settings the values of the spring arm component inside each character blueprint are different. From time to time the settings of the spring arm are reseted without a special reason. All the correct settings are lost and replaced with different settings, sometimes not even the default values. Has someone experienced the same problem?