First, open the telephone app, then go to recent calls, select a caller and you wull here his or her namen followed by the word user_label-primary. Maybe not a bug but really an annoyance.
Second, open the control panel and try to set a timer. You won't be able to fulfill this task. I do not use the panel frequently so maybe this has been the case for longer but I personally believe we have the first 2 ios12.1 bugs that were not tested or mentioned before.