vcenter does not work with scale

[lverre]

When using class="vcenter" and deck.scale, the element is being crazily scaled.
For example, I have a

<div class="deck-container">
    <section class="slide" id="Title">
        <h2 class="vcenter">My Title</h2>
    </section>
    ...
</div>

The slide gets scaled by a factor of 20 in my screen (small laptop screen) and I can barely see the title at the bottom of the screen.
It seems that this is caused by the vcenter class that has "position:absolute" which causes the element's height to be 0.

[imakewebthings]

@lverre Can you show this to me in an example?

[lverre]

Here's a working example: http://codepen.io/anon/pen/OyZZrr#0

Note that the issue shows only for the first slide. The following slides appear to ignore vcenter.

Note also that if I add a transition css, I do not have the issue anymore.