Macbook Pro Late 2016 Monitor Flicking when using Viber video
This sounds a lot like GPU driver issues or application issues where the developers of the fiber app can fix things. Tons of libraries make hardware assumptions and might need to be updated for the new Apple hardware and GPU. 

if this is something you can easily reproduce on new hardware, the chances of Apple or vibes fixing it are high. Unless you don't need the latest GPU and can exchange for the non touchbar Mac - I'd work with software side to get the bugs addressed even though that can be slow and frustrating and sometimes opaque as companies typically shield engineering staff from users with bugs to report.