I have seen a couple of threads where people have taken a (stupid) cycle and had no ED during the cycle but post cycle therapy had issues. From all of the responses I have seen people believe that it is the compounds they took during the cycle that messed them up.
I am on trt and if I add nolvadex to my trt I immediately go limp. So some people may not be having the ED issues because of the cycle, but rather because of the pct. Everyone reacts differently but I am not the only one this happens to. Just thought I should mention in case this helps someone.