I can confirm that changes in SU6 have broken several of our wake effects and they are spawning in front of our models. This seems to be mainly or exclusively on any effect that has been attached using the OFFSET method to move the effect. The affected models were working fine pre SU6.
Other wake effects appear as a black 'oil slick' beneath the water.
P.S. We can't tag the topic as 'fx' as it's only 2 characters long.