Before anyone comments, Pace fork = not very "imaginative" but it just seems right (as an ex-P7 owner!)
It sounds like you had the rebound damping set up way too soft, or too little oil, or the wrong weight oil in the damper. I had an RC36 on a P7 and after changing to a stiffer spring (which would have given a faster rebound) was able to increase the damping to make it all behave well again.