So what's going on in your comp. Without details you might just as well ask "Why is watermelon?"
CC 2017 is working just fine for me in all of my standard workflows using standard HD, 2K and 4K footage from professional gear.
It happens in all comps. so not comp specific.
3d layers and camera movement.
no plugins, no special things.
1080p sequence, 25fps,
Windows 10 48GB ram, Nvidia gtx980Ti, Dual XEON HP Z800, 3x SSD RAID 0 for AE CACHE.
Can we see a screenshot of your preview panel? Please make sure to reveal the options for the method you are using to initiate preview.
Also, what method are you using to initiate preview?
Classic rendering engine?
I'm having these same problems as well. I recently purchased Adobe After Effcets CC 2017 and everything renders fine but when I go to play it, it's stuck on one clip and doesn't move. I'm not a genius with computers or softwares but when I used cs6 I never had this problem. Can someone please help me? Thank you.
What are your system specs and which OS are you on?
Please provide more information on this issue and we will try to get that sorted.
Please see above comments. (of Rick & Szalam)
Sorry for this frustrating issue. Are you still experiencing it? Please let us know, or let us know how you solved it.