Why is audio spectrum doing random flickering?

[Jadxn]

Here is a reference video 24kGoldn x Iann Dior - Mood "Why you always in a mood" (TikTok) (Bass Boosted) - YouTube every time i render a random flickering affect thing comes up 

[tiktok5E72]

Hey there,

Thank you so much for sharing the link:

https://www.youtube.com/watch?v=tiktokdownloaders

I was looking for this since long time and finally got it.