Cod mobile won't download, what to do?

I wanted to download cod mobile and tried it 2 times, but each time after it had actually been downloaded 100% the screen should look like when you reinstalled the game, so I had to download it again, I had the same problem at pubg mobile. I have the huawei p20 lite.

I once had my solution: Stay on the cod mobile page in the Play Store the whole time and leave the screen on.

Thanks, I managed it differently, but I'll try it next time, thanks