Unfortunately, CC 2015 also has this bug!, but, so far, I experienced it only when I had an adjustment layer containing the following effects: Lumetri Color, Color Balance, Color Balance (HSL) and the Tri Way Color Corector. I had a lot of others adjustment layers containing the Lumetri Color, the Color Balance and the Color Balance (HSL), but only when I added the TriWay Color Corector I got this flickering issue. Also, the weird thing is that although it was clear the TWCC caused the problem, the flickering disappeared when i turned off the Color Balance and not when I turned off the TWCC.