I posted the game in the play market in a beta test, after I decided to transfer it to a working one, but in the market it writes near the name "beta test". What did I do?
My guess is that, if you open Google Play from a different browser where you are not logged in, then the app will not be shown as Beta. So for any non-beta testers viewing it for the first time on their phone or via browser it's going to show up correctly.
If this occurred from the user's account side, it's because if one specific account subscribed to a beta program it will show as (BETA) on the Google Play Store. So, to remove the beta the user just has to do the following:
Another thing you can try is to clear Google Play store's cache by navigating to "settings -> apps -> view all -> google play".