Добавил задержку перед удалением блока

Assets/Scenes/Island.unity

@@ -171,6 +171,7 @@ MonoBehaviour:
   _pathStart: {fileID: 1415278839}
   _pathEnd: {fileID: 761061820}
   _resetBlockTime: 0.03
+  _destroyBlockDelay: 0.5
   _pathFinish:
   - {fileID: 1987853413}
   - {fileID: 1569763699}

Assets/Scripts/SandPathBuildService.cs

@@ -13,12 +13,15 @@ public class SandPathBuildService : MonoBehaviour
     [SerializeField] private BlockScript _pathStart;
     [SerializeField] private BlockScript _pathEnd;
     [SerializeField] private float _resetBlockTime = 0.5f;
+    [SerializeField] private float _destroyBlockDelay = 1f;
     [SerializeField] private BlockScript[] _pathFinish;
     [SerializeField] private BlockScript[] _predefinedBlocks;
 
     [SerializeField] private UnityEvent<BlockScript> _onBlockDestroy;
     [SerializeField] private UnityEvent _onBuildComplete;
 
+    private float _spawnBlockTime;
+
     public event UnityAction<BlockScript> OnBlockDestroy
     {
         add => _onBlockDestroy.AddListener(value);
@@ -95,6 +98,7 @@ public class SandPathBuildService : MonoBehaviour
             return;
         if (block == _currentBlock)
         {
+            if (Time.time - _spawnBlockTime >= _destroyBlockDelay)
                 ResetLastBlock();
             return;
         }
@@ -106,6 +110,7 @@ public class SandPathBuildService : MonoBehaviour
         var t = block.transform;
         _currentBlock = Instantiate(_blockPrefab, t.position, t.localRotation, t.parent);
         _blocksInPath.Add(_currentBlock);
+        _spawnBlockTime = Time.time;
         if (_pathFinish.Contains(block))
         {
             _currentBlock = _pathEnd;