If you have the ability to build the firmware, I recommend using the current master branch source: https://github.com/turing-machines/BMC-Firmware/tree/master. Just download a zip image, unpack it and follow the instructions in the README.md file. This source is a couple of commits beyond the official V2.1.0 image. It resolves the issue on the Nodes tab of the BMC-UI with power on/off and restart. Otherwise, the changes are not significant. I don't know when another official firmware update will be made available. If you have suggestions or encounter bugs, please report them as issues against the GitHub repo.