Phat constraint functionality in 4.8 version

Hi mates,
someone used Phat and is still using it in previous Engine versions and now in actual 4.8 version?

I noticed in 4.8 version that in Constraint mode, the Soft Limit, Stiffness and Damping options are not working like before, i cannot obtain the bouncing effect i want, while in previous versions, i obtained some decent results.

Thanks in advance.