Are you using a Pouring Shield?
To prevent dry ingredients from coming out of the bowl we recommend using a pouring shield.
CLICK HERE to learn more about pouring shields.
Try the Soft start feature
If you bake a lot of bread or other items with a lot of dry ingredients, you may want to consider a mixer that has a "soft start" feature.
Select models have a "soft start" feature. The mixer may hesitate momentarily when turned on. The speeds will then increase gradually to the selected speed. This is to prevent flour and other ingredients from flying out of the bowl.