Finder opens twice after adding the attaches field

Hi,

When you add an attaches field, the finder/explorer opens automatically.
But this takes like a second or so before it opens.

When in the meantime you click on the select a file box, the finder opens again after you selected a file initially in the automatically opened finder. So in that case the finder opens twice, which is a bit confusing.

Maybe it's better to disable click events on the button till the finder has opened initially? Or disable initially opening the finder?