GrassGames

Situation: You have a 4Hearts in foundation and 10 9 8 7 6 5 Hearts in tableau. You also have open spots in tableau. Game will NOT prioritize play-to-foundation. Instead it sends the 5Hearts back & forth to blank spots. FRUSTRATING!
Please update and make it so the Foundation is the PRIORITY.

In some solitaires, moving cards to a foundation pile that is two or more cards higher than another similar foundation pile, can restrict playing moves, so there's a rule that it won't automatically move cards there in this scenario by design. Its not a bug.

You can also try changing the auto-play settings to full if its available for that solitaire.