Good day,
the update before the last one I thought I was imaging things, since I didn't saw it clearly. But with the todays update (build 202420900) I made sure to look closer and unfortunately I didn't imaging it. After both updates, after rebooting the phone and unlock it there was a short message at the bottom of the screen saying: "Don't forget to start shizuku!" for about 3 seconds.
To see, if the message shows up after every reboot, I rebooted manually two times and there it was again.
I never installed an app like that and I never heard about it, too. Actually the last time I installed a new app was several weeks ago. A short search on the net tells me, that it's probably about this app:
https://shizuku.rikka.app/
But I definitely can't find an app with that name on my phone, not in the user apps and not in the system apps. I couldn't find anything related to this strange message after an GOS-update on the web, so I'm hoping someone here can tell me what it's all about?