Adobe has released a list of known issues in Premiere Pro CC 2017. If you are using Premiere Pro CC 2017, or considering upgrading, it is highly recommended you read this, and be aware of these issues. Please note that for each issue, there is an Adobe-recommended workaround. 

This document provides information on the list of known issues in the Premiere Pro CC 2017 (November 2016) release. —Adobe

Source: https://helpx.adobe.com/premiere-pro/kb/known-issues-in-premiere-pro-cc-2017--november-2016-.html