First of all, this is not a question about the MacOS, but about iOS, so it's the wrong forum.
Second, I see no question at all to answer.
Two good reasons to lock this thread. If you have any questions about iOS, please post them in this forum: https://www.cnet.com/forums/iphones-ipods-ipads/ .
But maybe https://www.google.com/search?q=ios+12.1.2+Bugs already has the answer? Then that's the fastest way for you to learn what you want.
ios 12.1.2 many bugs. please answer this question