My iPhone 12 Pro Max wall paper turned blurry last night and at the same time froze my ability to open the phone. I was able to turn it off and then turn it back on. When I did it seemed to reset everything. This morning I woke up to a solid black background but no blurring. I turned my phone on/off again and in doing so it seemed to fix the problem. My wall paper returned to my previous setting. The blurring occurred one other time earlier this week but never before. The wallpaper turning black has happened several times over the last few months. Software bug issue?? My phone was fully charged and updated