jQuery .show() a flex box

I have an element with a flexbox

<ul id="myFlexbox">div#myFlexbox{    display:flex;}

after hide it and show it, it gets messed up.

$('#myFlexbox').show();

now the element has a display of block instead of flex.

<ul id="myFlexbox" style="display: block;">

How can I use .hide and .show with flexboxes?