My CTR in one of my app is high using admob interstitial Please Help

The admob Interstitial ad it shown once every 2 gameovers. it safe?
This my stat yesterday

Thank.

Not safe, way too high CTR. Could you show your game so that we could help.

sorry i’m could not show link google play but it “piano tiles game”

Whatever game it is, your CTR is abnormal. Since I couldn’t see your game, then try to figure out yourself.