Hi Cianán,
I've following problem:
I installed Beaumont Template on two instances of joomla - both joomla 3.4.8

Now the sticky menu on my localhost joomla version is working well - it IS sticky.
But on my webhoster's site it's NOT sticky.
Obviously there are at least two lines in the html code saying it should stick.
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<div style="height: 90px;" class="sticky-wrapper is-sticky" id="container_header-sticky-wrapper"><div style="height: 90px;" class="sticky-wrapper" id="container_header-sticky-wrapper">
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In both cases it's exactly the same, but in one case it's sticky and in the other case not.
Can you help here?

I couldn't finde anything different in both template - backends.

I greatly appreciate any hint ;-)

Many Thanks
Wolf