Neutral Altars and Teemo

Hello,

As it was the first time I pick teemo on this map, I realise that even if I was standing on a neutral altar to capture it, as soon as my stealth come the altar act as there is nobody on it and the charge rune start to decrease.

So I tried on the second altar, to see if I saw right, and it act the same as the first.

Is it intended or just a stealth bug cause of the no vision given of neutral altar?

If it's the first then, fell a it weird because, even if I'm not there visually for the possible near ennemy, I can still see my character on it wanting to capture the point >-<