My little man is a great sleeper... for 40 minutes! We have this same issue for us and have had for a while.

For us, bedtime is bedtime. We resettle him in his dark room. Now it doesn't take very long if he wakes at all.

He will generally wake after 40 minutes if he's been awake for too long before bedtime. So when he has his bottle he crashes because he is so tired rather than falling to sleep properly.

It's all swings and roundabouts. Your little one is still very little and could be changing, could be going through a phase or could be doing this for no good reason at all! I just go with it now.

Best of luck.