====== Screen image of my app ======
{{:en:img_3567.png?direct&400|}}

====== Crash logs ======
The link below is archived crash logs.

{{ :en:crash_logs.zip |}}

There are eight crash logs in zip file. In all of them, my app crashed because of EXC_BAD_ACCESS (SIGSEGV) in com.apple.scenekit.scnview-renderer thread.

In my investigation, main thread is processing SKNode childNodeWithName in 6 cases of 8, and SKNode removeAllChildren in 2 cases of 8 when crashed.
I guess there are some race condition or something between these SKNode function and SCNView renderer.

====== Photo for reproducing issue ======

{{:en:img_3536.jpg?direct&400|}}