Ontheheavens says there's some issue with Djinn where his units will just automatically move towards the entrance and sit at it despite not setting such orders. Seems to start at about 8:30 as soon as the entrance is created.

EDIT: Actually might be caused by the "Teleport AI (experimental) v2" widget which is disabled by default. The problem seems to be that the units instead guard the entrance instead of actually teleporting.