applicationId is null. in quickblox android after the app goes to background for long time

Question

My clients keeps getting this error randomly specifically when the app run in background for long time and then they try to open it i can not reproduce it . Does the QquickBlox object become null at any stage after it is initialised. This is the crash log.

Fatal Exception: java.lang.RuntimeException: applicationId is null. You must call QBSettings.getInstance().init(Context, String, String, String) before using the QuickBlox library.
       at com.quickblox.core.helper.Decorators.requireNonNullInRuntime(Unknown Source)
       at com.quickblox.auth.session.QBSettings.checkInit(Unknown Source)
       at com.quickblox.auth.session.BaseService.createBaseService(Unknown Source)
       at com.quickblox.auth.QBAuth.createSession(Unknown Source)
       at com.quickblox.auth.session.Query.createSessionByParameters(Unknown Source)
       at com.quickblox.auth.session.Query.createSessionIfNeedAsync(Unknown Source)
       at com.quickblox.auth.session.Query.performAsync(Unknown Source)
       at com.eyecura.eyecuraandroid.authHelper.AuthHelper.loginCustomObject(AuthHelper.java:155)
       at com.eyecura.eyecuraandroid.activities.auth.LoginActivity$5.onClick(LoginActivity.java:247)
       at android.view.View.performClick(View.java:5210)
       at android.view.View$PerformClick.run(View.java:20976)
       at android.os.Handler.handleCallback(Handler.java:739)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:145)
       at android.app.ActivityThread.main(ActivityThread.java:6145)
       at java.lang.reflect.Method.invoke(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:372)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)