I wonder if Charles was advised to not see Harry before his trip to Nigeria for concern it could be misconstrued as a tacit approval, you could just imagine Harry saying something like 'Pa is supportive of my trip to Nigeria, as we talked a little about it and his previous trip'.
I wonder if Charles will have a full schedule again on Harrys' return should he transit the UK, for concern it could look like Harry giving a debrief on the visit.
Harry really is a loose cannon, even within Invictus now, he is beginning to look like he has lost the plot in favour of aggrandising himself and his wife. No one in their right mind thinks Nigeria is a realistic location to host the games.