Mine has done the same but I don't think it is due to the space between the cowl and baffles. I have a couple of layer of fiberglass added to this area which holds the push/pull cable to my oil door. Adding fiberglass does effect the cowl or wingtip as I believe it will shrink a bit and distort the material.
On mine this happened initially during the first 50 hours or so and has not changed since.
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying