Thanks for taking the time to document your testing so thoroughly. The fact that the disconnection only happens on iOS and not on Android really points toward an app or Bluetooth compatibility issue rather than a hardware fault. Your step-by-step observations and the crash log should make it much easier for the developers to reproduce and investigate the problem. While reading about similar issues, I also found a resource that another user had recommended, which you can view here. I found it useful and thought it might be worth sharing with others following this discussion.