@drikk nice one! It works way better than the other clients I tried.
Meanwhile cinny fully broke for me after an accidential logout, after which it keeps crashing on startup login attempts. Even after allegedly deleting all app data using UT tweak tool and reinstalling cinny, the issue remained unchanged. Magically however, cinny still keeps pushing out notifications from my supposedly terminated previous session.
Thus, my "undead" cinny now enables a kind of arkward workaround to add notification functionalities to the otherwise well working hydrogen client. For now, I'll keep using this "dream team" I guess.