Using FRunnable my all code is in Main Thread. Please, help me.

I create child class of FRunnable with name FSortThread.
My code you can see:
photo_2022-03-31_12-59-10 (3)


After play in unreal engine editor, my game crash.
It’s debug:

How I undersand, all code is in Main Thread, but why it’s?!
Please, help me!

I forget to write that start work this thread in BeginPlay in my GameMode