Arrived at home and homeowner showed me the hot water side of faucet. The flow is greatly diminished compared to the cold water side. Pulled cartridge and turned hot side isolation valve on to potentially dislodge any debris inside faucet, nothing came out. Reinstalled cartridge and disconnected the supply line hot side from isolation valve and turned on the cold water isolation valve to force water back through hot side of faucet. Small black rubber pieces came out. These pieces look to be from the old isolation valve that was on the hot side water line. These pieces could have broken off inside the isolation valve when the valve was turned off to install the dishwasher. Once water was restored these pieces went into the faucet. I recommend calling Delta and seeing if they are able to warranty the faucet. They could possibly send a replacement. No charge for today’s visit.