Great game: medal glitch though – Galaxy on Fire 2™ HD Review

Love this game, have over 50 hours played, but found a glitch with the medal system. I can’t get the “explorer” medal to gold. Checked wiki and elsewhere, I have to explore 22+ systems. I have explored every single system fully, including all hidden systems purchasable, but the medal won’t change. I have found other people with this problem. Devs, I don’t know if you will read this, but please help to fix this so I can get fireworks!
Review by Brush my room LoL on Galaxy on Fire 2™ HD.