Nobody can tell you anything without exact system info or other technical details.
My PC Specs are
Windows 10 version 1607
Cpu: Intel i5-4690k @ 4.2GHz
Ram: 16GB DDR 3
GPU: Nvidia GTX 960 Version 378.78
Main Storage: (where adobe programs are installed) Kingston 120gb SSD
All Adobe software on Newest versions as of 18/03/17
Are you still facing this issue? Please let us know.
This bug should be fixed in the update that released today. See Tim's post about it here. The After Effects CC 2017 update to version 14.2 is rolling out worldwide. It may take a day or so to show up for you depending on where you live. You also may need to log out and back in to your CC app or other funky things to get it to show up.
Please let us know if this works for you.