I've not gone and looked at that again, but from memory, no, absolutely no connection. Quite the opposite, in fact, as if my recall is right the product recall is because the cabinets weren't earthed, and therefore the last thing they would ever be able to do is to cause an RCD to trip.
But I am truly gobsmacked as to why someone who had a bathroom installed, was having problems less than 6 months later, had got the installer (or at least his electrician) back in who diagnosed a faulty item which they had installed less than 6 months ago, would do anything except say to them "you'd better replace it, then".