Are the offside rules wrong?

Hi FC Mobile players, 

I’ve recently found an issue with the offside rulings. I sometimes take shots on goal from outside the penalty area that rebound off the keeper, and when I score the rebound, it says it is offside. I understand that the player scoring the rebound may have been offside had it been a pass to him, but instead, it bounced off the keeper! Surely that’s the keeper’s mistake and not an offside! Please help and update the rules if possible!

My FC Mobile user is Quintus12.

Thanks!