Does anatta cause dynamic emotions?
What are &quot;dynamic emotions&quot; in Buddhism?

&quot;Dynamic emotions&quot; is somewhat sloppy language. It just means that samsaric phenomena, in this case emotions, are in a constant flux. They are ever-changing and arise and cease incessantly and without any control.

Does anatta or its realisation stop the stagnation of naturally dynamic emotions?

Sorry, I didn't understand this question. You write &quot;stop the stagnation&quot; - do you mean if the natural process of exhaustion of causes and conditions can be stopped by realizing Anatta?
There are 3 gateways/doors to liberation - truly realizing and understanding Anatta is one of them. So in that sense, the process of becoming can be stopped by winning Nibbana, thereby issuing liberation from the rounds of suffering.