No one knows how widespread the issue is since this is new ground. Floor levels of BB concentration required to see leaching with standard polystyrene setup? Relationship between BB concentration and amount of stuff leached with a typical filtering procedure? Function of amount filtered, filter life, etc.
This would be an active research project in a well funded lab.
The issue is already well known in industry which is why you dont use these filters in this type of application for pharma manufacture. But this is the UG.
@Photon has done a commendable/remarkable job capturing this issue and there is still much more to learn. It is not an issue related to only one source. It is a materials compatibility issue as was seen with vial spikes, etc.