How do I measure a variable of an instance to another overlapping instance of the same object?

So I tried searching around and I know this question has been asked before but I couldn't find a solution.

I have grid of objects, and I want to check if they are adjacent ot another object of the same type, and only then are you able to click on them. What I dounf in the forums was that you have to make them a family to be able to compare to instances of the same obecjt, but I can't get it work. I almost have it, but something is still off:

Here's how the grid looks:

And here's the code. It almost works, yet misses the occasional, so I feel like there's just one easy thing I'm missing:

The code seems ok to me. So what happens when you run it?

Check that the collision polygons are set correctly and that the sprites only overlap one other sprite at 80px offset.

If you're making a game with a "Match-3" mechanic and want to find matches of 3 or more elements, it's much more efficient to implement this mechanic using an array rather than checking object collisions.

If you need match detection reference example:

dropbox.com/scl/fi/6gqid9g6bqjp9i7t9xgen/find_detect_match_3b.capx

Thanks!