| That's probably because the first position block inlay is the biggest one in the series.
Which means that it's the stability of the inlay material not the maple fingerboard that is the issue.
Not sure what the inlay wood is. If it's actual ebony, that is fairly unstable wood (the Gabon more than the Macassar).
I would say, let the finish on the FB be your guide. Being a maple FB, there is probably a pretty good finish coating on there. If the raised block is not causing any noticeable distress to the coating, you're probably going to be OK.
So if you can feel that the block is raised but you can't see any separation, either between the maple and the inlay wood or lines or cracks in the finish film, it may not be a giant problem.
First position, you've got the nut right there, the raised block shouldn't cause any tone problems when you fret the strings.
I might be concerned about what happens in the middle of winter, when the neck bows forward and the FB compresses the block inlays. You might get more raising then. | 
