I suspect DARPA, like other alphabet orgs, has rogue elements. That said, it is extremely concerning tech companies have classified tech. DARPA is OCA, someone there chose to give them it, legally or illegally. If they never terminated connection with fb/LL, made it unack, that could be a conduit.
Is current leadership there at least clean? From the DARPA twitter, average tenure was something like 4 years. That is suspiciously low for DoD. Are they grooming clowns to send out to tech companies? Hard to believe their employee retention is weaker than Chinese corncrete!