Flexbox with column directions do not work correctly when using velocity slidedown

This has caused a bit of an issue in my current project forcing me to use jquery slidedown instead, I'll probably just have to implement a css animation myself but I thought this would be worth reporting anyway. The issue is essentially based on the fact that velocity slidedown causes display to be set to block every time. I also came up with a fix temporary fix, the line of code for this is in the jsfiddle. jsfiddle is found here http://jsfiddle.net/Shardj/65xCP/243/