When install the filter never loosen the philips screws as the cork gasket on the filter is a one time crush.

When refilling - fill about 3 qts of fluid and leave it alone for about 10 minutes, the filter will saturate with it. Or it may blow out. The first filter I removed from my trans had mangled up paper. I opened it up (tuff job) and found it blown apart. A mechanic told me that this happens when a flush machine is used with a new paper type filter immediately.

Lastly (not to sound really bad) your trans maybe requiring a rebuild.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)