Monkey's broke the cage off from the oil filter cap. IIRC the bypass valve is part of the cage but I may be wrong. Interesting filter.Here is another Problematic N55. And this is second I have seen this week with the same cause of tge problems:
Faulty oil change and he’ll ever since.
https://r.tapatalk.com/shareLink/topic?share_fid=91645&share_tid=1431520&url=https://www.bimmerfest.com/index.php?threads/Faulty-oil-change-and-he’ll-ever-since..1431520/&share_type=t&link_source=app