I got my fit all dialed in and after a couple hundred miles my hip is cracking in addition to my whole right leg having issues in the knee and calf and a tight glute. Some of the recent changes to my fit have been raising the seat to its optimal height, moving the cleats out so my feat are as close as the can be to the cranks and moving the seat forward on a zero setback post.
The zero setback seems to be the biggest factor. As I was not having issues last year on my road bike which had a normal seatpost. Now that I have a zero on both bikes the issue is very prevalent.
I'm wondering if in addition to the zero offset seat post, all the changes combined were too much too soon. I would try back off on the changes a bit to see if that begins to make a difference for the better.