Ever since I updated my iPhone 8+ to iOs 12, the missed call notification will not show on my lockscreen. So every time I have a missed call I would not know unless I open the phone app. I missed several important business and urgent private calls with this extremely annoying bug. The only temporarily solution is to switch off the phone and turn it back on again. The missed calls will show up on lockscreen, but after a while, the bug kicks in again. I have not turn on DND mode, already clean installed the iPhone, I have updated the phone to the newest version iOS 12.2, the bug still remains. I do not have this bug on my 6s and SE, which are on iOS 12.2 as well. Anyone else has this problem? Any fix?