[posixx]

 Correct. I use it in an Home Built HTPC with a I3 Coffe Lake and I have the artefacts since #814.
When I put an NViDIA gt1030 in the HTPC it works fine but no 4k/10 bits.
By the way the problem is common to all the skins I tested, Estuary included.
JM

Either I'm not testing correctly, or a Skylake i5 NUC isn't affected either.

Can someone provide step-by-step instructions so there's no mistake how this can be reproduced? 

It is not skin related. I tried Estaury, Mq8 and MQ6 mod skins. See a Video in Full Screen mode and then activate and deactivate the menu. You will see a rest of it at the bottom of the screen. You can also do this with info screen. Same result. You get artifacts on the screen. Not in the picture though, but on top and botttom of the screen. 

 Exactly. I ran this build on a custom build HTPC with  ASRock Fatal1ty Z270 Gaming-ITX/ac LGA1151 HDMI 2.0 ITX and Intel Core i7 7700T with HD 630 connected to LG OLED77C8P and have these artifacts as soon as menu's are displayed. Only on top and bottom as Ipaddle mentioned. I'm also ran it on a NUC Core i5-7260U and there the problem was not visible, so it looks related to hardware? As i mentioned earlier i reverted to build #0813 as this works on both without artifacts and working emby plugin