Yes, several virtual servers on which the alpha nodes were running had shut down. We knew that this could potentially cause data loss (which is why we didn’t allow users to run vaults in that network), and that is what happened, unfortunately. We restarted the nodes on the rebooted servers and the network structure seems to be fine again. We’ll keep the alpha network running for now, but we can’t restore the lost data.
We are planning to implement ways to even completely restart a network and republish the data it had, and once that is in place, we will be able to make the content survive such failures, and even persist it between different alpha networks.