Firmware is still in Beta. There’s still tons of bugs and we’re all waiting on a stable version. The CSS610-8G-2+ is the same chipset. The SFP ports have been the biggest issues for others.
See thread right above yours or click below for more info.
http://forum.mikrotik.com/t/css610-8g-2s-management-access-from-sfp-port/144001/1
And here’s another thread with same exact switch regarding SFP issues.
http://forum.mikrotik.com/t/netpoer-lite-7r-and-problem-with-sfp-dhcp-gui/144018/1