k70 rgb rapidfire K70 rapidfire media keys cause fps drops in games

After installing the new windows 10 fall update, my media keys on press cause massive fps drops in csgo. I normally get around 400-500 fps but after pressing stop/play (with spotify being the active program) or the volume scroll my fps in game will drop to 150.

I have tried the following:

Updating CUE, reinstalling csgo, reinstalling spotify, enabling gamedvr/game mode. I also uninstalling/reinstalled my gpu drivers as well.

None of the above have helped so far.

Has anyone experienced this problem before? Thanks.

Edit: I actually tried my old keyboard (SteelSeries 6Gv2) and the problem still occurs when I use the functions keys as well.

Edit2: The windows update actually un-checked disable full screen optimization on my csgo.exe, Disabling full screen optimization fixed my problem.

Sounds like an issue with the update rather than the keyboards/game if the issue only started after it.

Try contacting Microsoft and see whether they can provide any suggestions to try.