Panel4D has a lot of issues, so I don't currently test against it, but it would be easy to do so.  Just change on line 14:

```Python
self.arr_shape = (11, 7, 5)
```

to


```Python
self.arr_shape = (13, 11, 7, 5)
```

I think prime numbers are best since concatenating arrays will always produce different dimensions.