The port backups that have paralyzed food shipments around the world for weeks aren’t getting much better. In fact, in some places, they’re getting worse.

In the Philippines, officials at a port that’s a key entry point for rice said earlier this week the terminal was at risk of shutting as thousands of shipping containers pile up because lockdown measures are making them harder to clear. Meanwhile, curfews in Guatemala and Honduras, known for their specialty coffees, are limiting operating hours at ports and slowing shipments. And in parts of Africa, which is heavily dependent on food imports, there aren’t enough workers showing up to help unload cargo.

The port chokepoints are just the latest example of how the virus is snarling food production and distribution across the globe. Trucking bottlenecks, sick plant workers, export bans and panic-buying have all contributed to why shoppers are seeing empty grocery store shelves, even amid ample supplies.