All items get rendered

[jadbox]

I've created a fresh project using the latest svelte, and it looks like if itemHeight isn't set that some limited set amount of components get added to the DOM but never updates on scroll. If itemHeight is not set, all the items get rendered all the time, even if they are far off screen.

EDIT: it seems like if I set the Height property in pixels that the items get rendered, but it generates a nested scrollbar for the container of the item elements.