Dragging elements renders the tree thousands of times, performance issue

I have a tree with 10 elements at most, all elegantly coming from an API and rendered well in the frontend.

No matter what I deactivate I noticed my drag&drop function is slow, like really slow, sometimes freezing up the browser because of the multiple calls to the rendering function.

For example, a simple drag can make between 3000 to 60000 updates (I discovered this by placing a console.log in generateNodeProps).

I can't reproduce the problem for you, locally somewhere as this is an internal project I work on.

Any idea how I can solve this rendering issue? I use webpack, es6 and the latest react+redux.

Thank you!