Starbucks has implemented new restrictions on its mobile ordering system, capping the number of items per order to 12 as part of a broader effort to reduce wait times. As mobile orders surge, some Starbucks locations have struggled to keep up, slowing in-store operations and leaving baristas overwhelmed by large and time-consuming orders.

Starbucks is making a major change to its mobile ordering system, one that aims to cap the number of items consumers can purchase per order at 12. The change is part of the brand's larger effort to reduce wait times,

Starbucks Corp. is placing some limits on its mobile orders, part of a broader plan to speed up service and contain a deluge of purchases through the app that often overwhelm baristas.Most Read from B

Starbucks is rolling out more changes under new CEO Brian Niccol, and the latest shift focuses on mobile orders.