Slowness with this January Beta

Additional to the frozen screen I am getting too many cases with the windows desktop slowing down to a crawl and becoming unresponsive for what seems to be a loooong time. When it becomes responsive again it lets you scroll up and down in every pane but if you scroll up enough its not rendering the upper items and if you scroll down enough it doesnt render the lower items.

You have to wait a LOOONG time for the app to become fully responsive again.