Stock Huawei Honor7 Notification Question
Ok, I finally found the solution - problem was (probably) within the MIUI-Overlay:
I had to install PM Plus-App for Huawei/Honor to unlock the "Startmanager"-menue within the preinstalled "Telefonmanager-App" (german version - english may be "security app"??)
Inside the "startmanager"-menue one can toggle on/off autostart for installed apps. After switching the mode, the phone has to reboot to take effect. BUT in my case the desired app HAD TO BE RUNNING when turning of the phone for the reboot.
Its now working fine and i receive notifications even with closed app and after a reboot.