One thing I want to mention, a few people have looked but didn't find the filter at first because it was down inside the banjo bolt and it's not apparent that you are looking at the back of the filter. I've added a little info to the TSB page but I want to say get some good light and look closely to be sure you don't miss it.
Filter down in the banjo bolt:
Why I think they are getting forced out, the oil pressure pushed it down:
There is a filter in the line on the other side of the oil feed pipe but that one is being forced into the bolt: