I listened to that part again and I didn’t hear any dead air, I have ambience running throughout. You may have misheard it or maybe I’m missing it! If you wouldn’t care to double check I would appreciate it. You should hear that locust-like sound all the way through.
I also watched it on my phone, so it’s entirely possible that I’m dead wrong and my phone’s speaker is just shit. I’ll try and give it another listen later on.