Coronavirus and massive demand have turned US online grocery delivery into a big headache

An Instacart employee searches for an item for a delivery order in a Safeway grocery store while wearing a respirator mask to help protect himself and slow the spread of the coronavirus disease (Covid-19) in Tucson, Arizona, US. As home food delivery has gone from a convenience used by a relative few to a boom industry, buying food online has often became a big headache. Demand is so high that some services and markets have fallen more than a week behind. Others, such as Whole Foods, have stopped taking on new customers altogether. — Reuters

Six weeks ago, grocery shopping from home was efficient for Elliot and Morgan Landes and their two daughters.

The Pennsport family would wait just three hours after placing their order to receive their food at their door.