Frame Rate drops to 30 with Dell P2415Q 4K MBP: MacBook Pro (15-inch, 2016)

macOS: Mojave 10.14

Display: Dell 2415Q

Connection: ANKER Premium USB-C Hub with HDMI 

I have done an FPS test and it's only 30 (which should be 60). Is it possible to make it a 60 FPS rate? What can I do?

Update: Anker is innocent. It's NOT Anker's problem.
According to Anker's community site  (which is unofficial, community backed) the USB-C hub only supports 4k at 30 Hz. You would then never be able to achieve 60 fps with this hardware.

I would contact Anker's customer support and get this confirmed, and see if you have any means of returning the product for a refund with the seller.