KeyboardWatcher | Keyboard popup and keyboard hide monitoring

I am trying to program snake in console. After a random amount of steps the snake takes, a new GameObject spawns (e.g. an apple that makes the snake grow or a mushroom which makes the snake faster).

I create a random gameObject (on random (left, top) coordinates and then I need to check if that gameObject spawns on top of a snakeBodyPart or on top of another gameObject. If that is the case, I create a new gameObject and try the same again. Only if it doesn´t collide with another gameObject or the Snake, it will spawn.

snakeElemnts = a list, which has all the snake- body-parts; gameObjects = a list with all existing gameObjects;

If the noCollisionAmount == the amount of snakeElements and GameObjects, there should be no collision and the new GameObject should spawn.

Unfortunately at one point (early on), the snake just stops moving and nothing happens (no exception or anything).

I can´t debug because I have a KeyboardWatcher running, which checks if a key gets pressed. Therefore when I press break, I can only examine the keyboardwatcher.

Setting a breakpoint is not useful, because I never break when the problem arises.