Prima luna equipment cable sensitive

First time poster here, please be gentle. Ive been using and enjoying both a Prima Luna evo400 power amp and Prima Luna evo 200 pre for about a year now. Recently I’ve been experiencing loss of signal at RCA connections of both units ( input of the power amp and output of the pre ) .this happens pretty frequently and either wiggling the cable and or twisting it returns the signal. So far Ive tried cables from Acoustic Zen ,Kimber and two from Audioquest. The Kimbers are working the best and they actually feel tighter when pushing in although the AZ,s are actually locking RCA,s. Obviously this is a problem with the  Prima Lunas female RCA,s and not the interconects, just curious if any other Prima Luna owners have had a similar experience? and yes I have contact cleaner coming,thanks in advance for any help.