quick question. A friend of mine found bubbles under the crust of a 100% sourdough rye bread I made for them recently. They also found it a little dense (although its full of seeds and I thought rye+seed=dense). Could those be signs of overproofing as im not kneading it nor shaping it in any really fashion just kind of scraping dough into loaf tin and flattening it out with wet spatula (actually could flattening the dough with spatula inadvertently cause air pockets to appear?)