Hello,
I installed 11.0.9 over the updater and it worked. I had some problems with magisk and root, (wantet to add xml file for *no-support-for-this-app-on-this-forum* for example) the magisk manger tells me, magisk is not installed.
Used TWRP 3.3.1-0 before, downloaded 3.3.1-62-cepheus-mauronofrio.img and now flashed...