Changing the transmission fluid on a 2016 ford explorer with a transmission shutter

I was going to change the fluid and filter in this transmission but the filter requires taking the transmission apart. In the first moments of this video you can see the shutter in the tachometer. I first changed the plugs and it did not go away. I then researched it and found these transmission are know for the shutter. I changed the fluid and added the ford additive. I test drove it afterward and the shutter was gone that fast.