LinkedIn sharing - meta tags problem

Hi there,

I would like to add a LinkedIn sharing button on the landing page. I've used LinkedIn's plugin for the sharing button (added through Marketo's HTML element) and have added the below meta tags to my custom head html, but my sharing button is still not populating the correct title and description. Does anyone know the trick? Or is Marketo just slow in terms of loading? Thank you!

<meta property="og:title" content="Who has been buying and selling in Asia?" />

<meta property="og:description" content="This month’s Asia Metro Targeting report focuses on Chicago-based investors." />

<meta property="og:url" content="info.ipreo.com/WC-2017-03-Asia-Metro-Focus---Chicago_test.html" />

<meta property="og:image" content="info.ipreo.com/rs/230-SPZ-348/images/HongKongbanner.jpg" />