Try with the latest SwOS 2.0 for CSS326 build from https://mikrotik.com/downloadI recently upgraded my EdgeRouter Lite 24 to CSS326-24G-2S+RM, running 2.0 (built at Tue Oct 18 2016 14:57:22 GMT+0300 (EEST))
You already have 2.0, but I think there is a newer build available