Nestle USA, the American arm of the world’s largest food company, acknowledged a supply chain issue Tuesday just days before it rolled out its Black Friday TV ad.

The Admont plant near San Diego processed the bulk of Nestle products such as Kit Kat and Ganss, the company said.

A rash of food shortages occurred at the plant between Sept. 11 and Oct. 4. Some customers complained they couldn’t buy their favorite products. Some did not receive their orders, while others saw different labels and flavors.

“Nestle USA was disappointed to recently observe an isolated occurrence at our Admont, California facility,” officials said in a statement. “We’re taking action to ensure quality product for customers.”

Nestle officials did not disclose what the action was, nor did they say when it was resolved. The company said in a statement it was “working closely with affected customers to share our plans to solve the issue.”

Officials said: “At this time, our customers are able to access Nestle’s full product portfolio. We are working with them to restock with product on their requested order dates.”

The Admont plant processes products such as: Butterfinger and Oreo chocolate bars, Butterfinger and Reese’s Peanut Butter Cups, Junior Mints, Häagen-Dazs ice cream, Hot Pockets, UHT Butterfingers and Eggo waffles. The plant also manufactures Arrowhead Mills, wholegrain bars and Crunch bars, among other products.

Nestle USA is now preparing to launch its Black Friday ad early next week. The company has been touting a link to that ad on social media.