Issue with unity ads when downloaded via google play store

There are issues when playing my game if it is downloaded via the google play store. When played on apple devices or when I test my game by building it directly to my phone ads play with no problem what so ever. But when downloaded via google play after watching ads the screen turns black for 3-5 seconds with the music playing in the background, sometimes the game is frozen as well even after the black screen goes away for a couple more seconds. The first and sometimes the second time you play an ad it works ok but definitely by the third ad this issue occurs and gets worse after each ad played. What confuses me is the game works unless done through google play. I know it is not my code because it works any time else other than through google play games and I have looked at all the settings on the play store and do not see where there is any issues so I have no idea how to fix this issue. any help would be greatly appreciated. Thanks!