Match 3 Game Blank Spaces Moving To Random Locations

This is whenever I start the game, so this image shows the game with the blank spaces at the locations I assigned them to, so that's good.


This is after I make a match. The blank spots I made are now filled up and blank spots appear at random locations on the board.


What could be the cause of this?

 

Here is my code

 

Hello there ,
if you dont want to refill the empty spaces you have to delete all refrences codes to (FillBoardCo function in board script)
the function I've attached below:

Code (CSharp):

1. //delete all refrences to this function
2.     private IEnumerator FillBoardCo(){
3.         RefillBoard();
4.         yield return new WaitForSeconds(.5f);
5.  
6.         while (MatchesOnBoard()){
7.             yield return new WaitForSeconds(.5f);
8.             DestroyMatches();
9.         }
10.         findMatches.currentMatches.Clear();
11.         currentDot = null;
12.         yield return new WaitForSeconds(.5f);
13.         currentState = GameState.move;
14.  
15.     }
16.  

 

Hello, thanks for the response.
Whenever I make a match I DO want the board to fill up again(to have the possibility to make new matches), but just not in the blank spaces I made.