I would guess it is due to labor supply going down at the price grocery stores are used to and willing to pay.
I am seeing the same story play out at many other in person businesses used to paying low wages for in person work, especially at undesirable times of the day and week.
Daycares, hotels, restaurants, car rentals, healthcare, etc.
I've also heard that parking-lot delivery orders are causing labor issues. If you order a bunch of stuff from the store for curbside delivery, an employee has to spend a significant amount of time doing the shopping for you, likely in addition to their other duties. This is apparently VERY disruptive.
I am seeing the same story play out at many other in person businesses used to paying low wages for in person work, especially at undesirable times of the day and week.
Daycares, hotels, restaurants, car rentals, healthcare, etc.