4 week old will not go back to sleep!!

Our 4 week old we can put down for bed easily and he will sleep a 4 hour stretch before wanting a feed. But almost every night, it’s nearly impossible to get him back down after the feed! We try to keep it strictly business, feed burp, change, reswaddle, and do our thing to get him back down but he fights it all the time! And it’s only between the hours of 2-4am. I’m not sure what to do. Maybe he thinks it’s time to be awake? I have no idea. Sometimes he will go back down but majority of nights it’s a struggle. Any insight would be appreciated!