I spoke with Apple Support TODAY and told them about the iPhone overheating and causing the Temperature logo to appear which reads (iPhone need to coldown before you can use it.) because MCOC is causing other apps to crash and restart without warning, and possibly damaging the housing and OLED screen to burn in. They told me that if it is a known issue it shouldn’t be used until a fix is released. I also asked if it does get damaged can it be linked to an app such as MCOC and I was told yes, which can help people make a claim to have Kabam pay for the damaged phone.
I also have transcripts of this conversation for mods if needed. Do not take down this post as it has legitimate backup from Apple Support so I would say that Kabam needs to get an update or remove the app from the AppStore until it’s fixed and it doesn’t damage any phones.