Weird wpautop behavior

Hi,
recently i’ve noticed that wpautop function added </p> tag (only the ending part of p) all over the place on my page, particulary in shortcodes.

After bit of experimenting, i am now able to reproduce this behavior on two completely different installations of wordpress (one of which is clean install without any plugins activated) simply by executing wpautop on this html snippet:

<div>
<div>
    </div>
    </div>

it produces somewhat unexpected output:

<div>
<div>
    </div>
</p></div>

I presume this is bug in wpautop function, or am i doing something wrong?

Thanks for help.