Linage OS 16 installation works like a charm. Thanks for your how to. I just struggeled a little with the gapps / treble wizard. They crashed everytime during the initial setup. After that I booted into TWRP and wiped dalvik cache and DATA.
This confronted me with an error at bootup (device cannot be booted, cause of some troubles with the data partition. The device suggested a factory reset, which I did.
Now it seems like to run like a charm. I will do further investigation.
Best thing about it is, that the notification LEDS seem to work!
Perhaps i get rid of the annoying reboots during I am phoning too (happened to me for about 3 weeks now.)