Thanks rex, ok heres the complete C2 pokki test project that i'm testing with. It contains the all the neccessary files and environment to load into pokki right away so all you have to do is just add it to it. The .capx is also in the package too.
I can see that the on_showing condition is definitely firing from your plugin, but it still doesn't seem to "unpause" the game. If i were to use the Browser plugin and test this for on page hidden, and showing it does work (unpause the game, and replays music).
Download pokki project and capx : here
BTW, do you know how to get pokki to display the loading screen while the game is loading???