I go to this Starbucks since it's within walking distance of my job. Never had an issue with them until I started regularly ordering their Honey Citrus Mint Tea. They correctly make it about 50% of the time. What do they keep messing up? They put two bags of the Jade Citrus Mint Green Tea instead of one bag of that and one bag of the Peach Tranquility Herbal Tea.
Not really a big deal but I can definitely taste a difference.
I've complained through their online form, and they promised to retrain their staff, but it obviously hasn't happened.