Thanks for letting me know! 
It’s so strange. We’ve been testing for this across multiple machines, with no luck of replicating it so far. Yet we see it in player videos.
If this is causing you any gameplay issues, you can revert to DX11 in the launcher by unticking the DX12 box.
Regarding the bug report: Could you double check that number? I’ve checked the system, but nothing is showing for that ticket. It would typically be 6 numbers and not 7 in length.
Unfortunately we are not able to reply to every bug report, but if you see ‘attached’ it means it has been assigned internally to a defect. This could be communicated better for sure, and I’ve raised this as something we should look at in the future.
If you file a support ticket, they should always get a reply. These are limited to account issue and serious problems (like can’t launch the game) though.
Thanks again. As soon as we get a repo on this, we’ll be jumping on a fix beyond going back to DX11.