Sorry for the delayed reply. I've run tests on several machines and so far have not been able to reproduce any leaks in CPU or GPU mode.
Looking at your config, I notice that the kernel version doesn't match the MSS install requirements. For Media Server Studio the best option is a "gold" install with CentOS 7.2. However, there is a script to automate a "Generic" install on Ubuntu 14.04 using the 4.4.0 kernel. I can't guarantee that this is an install issue but a wide variety of issues can originate from install.