Water – Why is water from the dispenser slow after replacing the water filter on the refrigerator

At one of our rental properties, we have a GE GSH25JFXN WW Refrigerator. Our tenant changed out the water filter because of the recommended time to change it. He said that before he changed the filter there was good water flow at the water dispenser. After changing the filter, water flow at the dispenser was slow. Here's his e-mail before I went out there yesterday

"Thanks for the email. I changed out the filter because it had been on for longer than 6 months. When I took the old filter off, that's when I noticed there might be a potential leak (where the filter is attached). I installed the new filter and the water would barely come out. I've changed out the filter before and never had this issue. I gave the reservoir time to fill and I also held down the water dispensing mechanism for 5 minutes (at the request of GE customer service to make sure any air was pushed out of the tubing). Was still slow coming out. GE recommended trying another filter in case the one I got was defective. I bought the official GE MWF water filter each time and am still having the same problem. My rough estimation is that it's taking 7 seconds to fill about 1 ounce."

Here's a picture of the point of connection for the water dispenser. Also when you take out the water filter, it kind of leaks at the connection and it stops when I press on a little white button on the right.

I went there yesterday to try some things:

1. I checked to see if there weren't any kinks in the piping. I found none.
2. I tried this solution. http://boogster.blogspot.com/2011/10/ge-profile-refrigerator-slow-water.html I didn't know what part the person was sharpening.
3. I tried cleaning the water discharge at the filter with a pipe cleaner and didn't feel like there was any blockage there.

So I noticed that he turned off the icemaker. I asked him to turn on the icemaker to see if any ice were to be made. This was around 5:30pm yesterday. I followed up with them today (12 noon) and he said the following:

"Just looked actually. Ice was made but not very much at all. The ice was also thin and even hollow in some spots so it's not getting very much water to make the ice."

I wanted to see if it's the main water supply to refrigerator or something that is just affecting just the water dispenser. I have attached pictures of the water filters for reference. There is a slight difference in the both of them. The old one is on the right.