We have a single lever shower and tub faucet. Recently when we turn the water on it has been taking much longer for the water to heat up coming out of the tub spout even with the lever turned to the hottest setting (water heater is located in basement almost directly below shower). When you pull the diverter to make the water come out of the shower head it has been taking much longer than normal for it to switch and with less pressure. There was also water dripping out of the lever. We replaced the cartridge inside the lever/valve which resolved that issue, but the other issues are still happening. We aren't sure what else to look at or try hoping there is a simple fix before calling a plumber. No other plumbing in the house or that specific faucet was changed or worked on prior to this starting. Anyone have any ideas?