I have a single-handle kitchen sink faucet. Over the last few months it has developed this problem where the water pressure/flow increases as expected till the lever/handle is about half-way through its range, and then it suddenly drops instead of increasing further as the handle keeps going in the open-more direction. I tried cleaning and replacing the aerator and also replaced the cartridge. When I replaced the cartridge I tried moving the protruding stub on the cartridge itself (the hard plastic piece that gets pushed/moved by the handle once attached) in the up/down direction before attaching the handle to it and it showed the same behavior. The flow increases initially, but after about half-way through it suddenly drops and then stays low (please see the attached picture). I apologize for using incorrect terminology, a novice DIYer here. Thank you for taking time tor read this. Any suggestions?