Breast probs after bottle?

Very recently my one mo old became comfortable with a bottle. I go back to work in one month and wanted him really accustomed to the bottle. But I've noticed that after a couple big bottle feeds he is now sloppy with his breast latch. Like foremilk leaking out around his mouth and frequent pulling away. Anyone else have problems with breastfeeding after starting a bottle? I want to be doing both... What did you do that was helpful?