that wouldn't have worked since pin entry didn't render, but, I was wrong to blame CF.Lumen. Looks like a bug in AOSP (systemui shouldn't crash when it doesn't have Contact permissions, but it does.) combined with a bug in either @topjohnwu 's Magisks 11.1 or @stangri 's AppSystemizer 10.0.7. It seems AppSystemizer randomly(=probably some race condition) causes system apps to not show up in /system/priv-app - causing the permission loss, causing the crash. I had just updated the CF.Lumen driver before this happened (probably prior to that, some other system apps were missing, whose impact I failed to notice.). Right now I'm randomly missing Calendar Storage, which is how I noticed this. Very weird issue.What I did was uninstall it real fast, then reinstall it and don't start on boot. Don't know if that'll work for you