Can't hide/show element and apply mapify

[sebcaps]

Hi, I'm encoutering the following issue: I've multiple images showing various data (ie one image per floor). Images and data are dynamically loaded, mapitf applied and then hidden. Image ar shown on user request with a button. The problem is that it seems that mapify does not apply when image are shown, unless browser window resized after image display. Please refer to this JSFiddle for a 'demo.

Thx for your help.