I noticed that when an item get a gem, it doesn't have the divider line :
with and without :

I wouldnt mind if that was the only issue, but as you can see on the 2nd screenshot, everytime I'm putting the mouse over the item with gem, a strange artefact shows up :/

more visible issue :

Since it's their rendering having a problem you'll need to bring it up to them and they can relay back here if it's something I can fix.

I've looked into the bug and luckily it is an easy one-liner to fix. I've made a PR for that here: #659