crib transition

So my lo is 3 months old. We just transitioned him into the crib last Wednesday and he did great! He slept the most hours starting at 6 the first night and then by friday he slept a full 8 hours in his crib! He’s never even slept 8 hours before so to be sleeping 8 hours while in his crib felt like a pretty big win! I’m not sure what went wrong but since he slept those 8 hours he has not slept good in his crib since and were doing the exact night routine we’ve done his whole life. He is waking up every hour and a half in his crib and I’m not sure what’s going on. I even tried less naps throughout the day, sleeping earlier, lots of feeds throughout the day and before bed and yet nothing is changing.

Any ideas on what is going on?