The strike by Starbucks (NASDAQ:SBUX) baristas that are members of the Workers United union ended on December 24. However, the labor issues for the coffee chain are far from over. The union organized the strike to protest a lack of progress in contract negotiations with Starbucks (SBUX).

Starbucks baristas' fast-growing unfair labor practice strike is expected to hit historic levels Tuesday as hundreds of stores nationwide prepare to join walkouts at the coffee giant. The Starbucks Workers United strike,

More than 5,000 workers were expected to take part in walkout that ends later on Christmas Eve, their union says.