WowAce

What version of Grid2 are you using?
Up to date : r946

Please provide any additional information below.

Alt power doesnt disapeared when Blizz hide it, when you go out of vision for example.

Grid2 does not track the state of blizzard interface buttons, the addon simply displays the alt power values provided by the game for all players (if the value provided by the game is non zero, the indicator is displayed).

It seems a game bug (the game is not setting to zero the alt-power values) I can do nothing about this issue.

that's what I assumed.. ill saw other bar / wa still visible, that's why.

Blizz issue, so i close this.

Thanks.