No, that's entirely reasonable (sorry for slow response!)...

From what I can see we've somehow ended up at a point where some thing respond to $(window).resize(); and some to Adapt.trigger("device:resize");. so this doesn't surprise me at all.

I've also found some notes from an old project that show that sticking .css({"display": "block"}) into L104 just before .velocity("slideDown", (etc) will help