Hi,
This is an amazing feature. One that I have waited for far too long. 
I’m using it on a client site. She uses tablet a lot so I checked it out on tablet. Here’s the interesting thing. There are hairlines appearing not only horizontally, but vertically too:
Here’s something weirder, I added a strip within a strip to give the instagram app a bit padding before the end of the main strip on desktop. If you visit https://glowupwebdesign.wixsite.com/bodyopolis , you will see this works well on desktop and it should be the same for tablet. All I get is a big gap:
Now I know that this sounds like a mobile problem (I have not done mobile yet), but everything else looks fine on tablet, plus my strip used for padding is transparent, so this big gap really shouldn’t be there.