Couple things on oats:
First – “oats fall” – it is part of the process.
Second – to thump or not to thump – you don’t always have to thump it is simpliy a technique. If you know your loaves are done just set them to cool.
Another thought – when adhering your oats, do make sure to give them a little pat/press on top of the loaf to help them adhere. That said, I always have stray oatmeal from the unmolding process, tipped out gently or completely inverted. One thing that helps, a friendly lab. Thankful for my dog at the end of bake to help clean up the oats that end up on the floor. 🙂 Happy baking everyone!