Kitchen Aid door water dispenser shuts off slowly

About a week ago I replaced the water filter on our fridge and now the water and now the water dispenser on the door doesn’t shut off immediately after releasing the actuator.

Ran lots of water through the line to purge air. Removed water filter but still the same. What’s odd is that it happened right after the filter was replaced.

Had a repair guy come out and he should because we have a reverse osmosis the problem could be low water pressure but it was fine for 3 years with the same setup.He wanted a ridiculous amount of money to replace the solenoid and said he would not guarantee that was the problem.

Any ideas on what it could be other than the solenoid ? Ice maker works fine
Thanks