This is what happens if your soap is too warm with cold process soap (or the volcano which is equally fascinating though slightly more dangerous to countertops and surrounding plantlife in the area). Things that contribute to a hot batch of soap can be fragrance or essential oil, beeswax, honey, cocoa butter and some milk additives.
To solve this, lower your temps by 15 degrees for the lye water and the oils AND check your insulation. Is it way over the top? By over the top, I mean: heat blanket + multiple blankets + warm room. A towel is just fine.
This soap is just fine to use. It just has an interesting architectural element in the hole and fun internal texture.
