So I recently repaired the motherboard on my iPhone XR at a store close to where I live, when I got it back however it started acting somewhat strange. A couple of examples are apps not working or being frozen the first few seconds when I start them. A couple of examples are the camera app, Instagram, TikTok, and Spotify. The volume buttons are sometimes also a bit slow only turning up/down the sound 2 or maybe 3 seconds after pressing. I updated my iPhone to the latest release, but could it be something else?