A recent, brief disruption at Canadian airports is a reminder that Russia-aligned hacking groups’ bark remains worse than their bite.

The problems began Sunday afternoon at multiple airports including Montreal-Trudeau International Airport, which reported that there had been “a national system failure of the automated kiosks” that was “causing a slowdown at border control.”

As a result, both residents and visitors arriving at airports faced delays. The disruptions appeared to last for about an hour in total, officials said.