Advertisement.IsReady() is not reliable

Hello,

I want to be able to tell if the RewardAd is Available so can either enable or disable the button that will call the reward ad, and i was just testing with this code (in Update)

Code (CSharp):

1. reviveAdsButton.SetActive (Advertisement.IsReady ());

And it works and it kinda doesn't, for example if i turn the internet off from the device, and launch the game, that button is indeed disabled, however, if i open the game with internet on, show a couple of Ads, then turn off the internet, that button will still be active, however when tapping on it, nothing happens.

Is there a way around this please ?

Thank you