Still night waking!

We got spoiled during the one glorious month of sleeping through the night when little man was 3 months old. Now that he is almost 7 months, he is still waking up about every 2 hours at time and taking super short naps. We have a super strong bedtime routine and consistent time. I put him down awake and he falls asleep on his own with minimal crying (<5 min). He isn’t hungry when he wakes in the night. He wears a zipadee zip for his startle reflex. Room is the perfect temp. He is starting to teeth but this has been going on for over a month.

What are we doing wrong??? Did we hit the bad sleeper baby lottery?