I am wondering if the fact that the housing isn't vented all the way is the problem. How was the filter filled prior to transfer? I am in the process now of tracking down filtration equipment that I can use for other things as well. I want to use a 1 micron for beer polishing, and maybe a lot larger micron for mash to kettle filtration or kettle to cooler filtration and pre-chiller hopping. In my opinion, the filter needs to be filled and vented completely prior to the start of filling kegs from it. Never having used a canister type filter before, I don't know (especially, filtering carbonated beer). I am glad someone else is doing the experimenting so I can get a better idea before I dive in.
I tried to taste a keg I transferred prior to Thanksgiving, and it is very yeasty even yesterday. I don't understand this at all from previous experiences where I had clear beer with no filter.