When chipping, most of your weight should remain on your front foot and your lower body should remain very quiet throughout the stroke. However, a common tendency is to sway during the stroke and that leads to inconsistency. Try this drill the next time you practice your chipping:
• Take your normal address position for a chip shot.
• Raise the heel of your back foot off the ground a few inches.
• Take some practice strokes keeping the heel of your back foot off the ground, and pay close attention to what it feels like for your weight to remain planted on your front leg. You will not be able to sway.
• Practice hitting a number of chip shots like this. You will find that you will feel more stable when you chip and the result will be crisper, more consistent contact.