These are strange times for the world's most famous coffee chain. Beating the pandemic downturn, profits are up and business is booming — but their clientele has been turned upside down. Jostling for attention among the commuters and Karens in training are a newer, younger customer base armed with baffling custom orders and supposed secret menu items. It's a predicament that is impacting those on the front line the most, as a recent video has illustrated. A TikTok shared by Starbucks employee a…