My folks are in their third year with their Jotul F3. They've been super happy with it. Yesterday, my mom mentioned that she noticed a spot where the paint was flaking off the stove and that she was able to pull some more off with her fingernail. See the attached pic in the upper left-hand corner where it looks a little worn. I'm not sure they have ever brought this stove up over 400-450 degrees. Could this be a curing issue? The stove is not abused in any way. Just curious if this is common.