Unity - what is Semaphore.WaitForSignal?

Question

Unity

I noticed micro delays between frames in my game, at first I thought about my scripts, looked - no. Then I looked at the profiler and found that everything loads some kind of Semaphore.WaitForSignal call.
I looked for information about this, and realized that this is a bug that has been hanging in unity for a long time, and maybe still hanging.
Please advise either the version without this bug or how to fix it. I will be very grateful to you!

Answer 1

This is not a bug, but an expectation of preparing for the next frame.