Converting the project to 4.17 makes phenomenon go away. (at least upon first try) Not a practical solution right now, but may indicate that it has to do with Metal since 4.17 turn metal off, am I right? Also the machine without problem is Xcode 9.0 and new machine is 9.0.1. (I will try to revert to Xcode 8.3 on this machine, but am not looking forward to it) Curious that problem is not persistent. BMC95 gets flickering on new project. Is the project created on Mac or win? Next curiosity. My college tells me that on the first day of testing the machine, when we first saw the flickering, we restarted the project and the problem was gone only to return next time.