I have a new Ryobi drill and bought a new Bosch concrete masonry drill bit set to drill holes into the wall of the exterior of my lath and plaster built garage. I notice from time to time when using the drill that the bits simply do not seat properly and they get stuck in the surface on this project and other easy jobs as well and the drill simply powers on. I've tightened the chuck as far as I can and it still doesn't hold the bit well enough. Is this normal, what's happening and why does this occur? It's frustrating and doesn't seem satisfactory performance to me. Please help.