Issues related to 16.7 should be added as ANSWERS to this question.
Release Notes: https://www.rockrms.com/releasenotes#v16.7
Technical Release Notes: https://community.rockrms.com/developer/changelog#1.16.7
There is an issue in this version that can cause Rock to continually restart due to Group Type hierarchy. This is the issue that affected Kingdom City when they first updated to v16.7.