Looks like Microsoft was finally able to get rid of a small thorn in the side of gamers that stream. Major Nelson announced on twitter that a new update will be coming to Windows 10 that will contain a fix for Game Mode that was impacting streaming and recording software:
The fix is one small part of the larger overall update KB4490481 (OS Build 17763.404) that is being pushed out today. You can read through all of the updates included
on the official page, but it is number two on the list without any other gaming impacted updates included that I saw. Regardless, this should be a welcome update (assuming it corrects it completely) for gamers that stream, as the Game Bar and Game Mode has been more hindrance than helpful since being introduced.