There is an inherent problem with CVH's and cam lubrication, yours is no different.

However, Kent have most probably in recent years chosen to outsource the cam blanks and followers from, how can I say, sources that are more geared towards cost than quality.

Take it out and have a look before going any further. There's no point in spending lots of time thinking about other problems, when the problem is most likely that the cam has gone Emo and chosen the 'self-harm' route in life.