The problem with SCNView and processor loading in macOS Mojave

I have a problem with Mojave and SCNView in my macOS program. But, I have also tested the simplest project and found the same problem.


So, if we start new macOS project with xib file, not storyboard, and put the NSTabView (with two TabView) in the window. Then when we place the SCNView in the TabView which is not active at start of the program what we will have after building and start program is 100% processor load. When we open the TabView with SCNView the processor load is dropping to zero.


This should not be like this, this simplest project has no custom code, just loading the Views.

How to solve this problem, nothing like this was seen in previous macOS.