Plunker
Gif

I have some components that are utilizing fxHide/fxShow; when these components are made visible, the fxLayoutGap isn't being correctly applied, as you can see in the GIF/Plunker. Looking at the HTML, I can see that the margin-right property isn't being applied to the newly-visible component, and only happens to a component that was previously hidden at first, e.g. in the Plunker, you should notice that the desktop tile will still retain its margin-right property even after it is hidden, whilst the mobile-only tile will never have it.