minigallery field : missing one thumbnail

I try this plugin field minigallery.
example :
www.paysdesmoulinsdeflandre.com/ ... ion-hangar

When rendering in front end I have just one thumbnail but there is really two images.

the thumbnail is there but it has folded to next row and thus it is hidden

ok, we need tighter CSS for minigallery field:

Edit file plugins/flexicontent_fields/minigallery/css/minigallery.css

and change this
to add 2 lines like this:
Will commit this to source code

Regards