dry spots

Hello! I have had my maple bonsai for about three years now. Recently, several of the main branches have started to dry out and die. This often begins near the leaves, which turn brown, and then the entire branch dies within a couple of days. I regularly water the plant and keep it out of direct...

This shows up on the leaves of this year. Initially, the tip of the leaf dries up, and then almost the entire leaf. The lower leaves are affected (leaves down the branch). Pyracantha is in inorganic soil for the first year and grown from a stump. What could it be, a fungal disease or root problems?