Exact same thing happened to me 2 years in a row. Remold the liner at the shop and you should be fine for the season.
If you manage to wear out the liner from too many remolds, you can get new liners right from http://www.intuitionliners.com/ . I'm using the Dreamliner now instead of the Powerwrap that came with my boots and I don't think I'll have this issue again.