Weird number when picking object in cryptomatte

Hi,

I have an object I want to pick for cryptomatte, but it gives this weird number instead of the objects name. I thought this must be a general issue/solution. Someone any idea how to get back to the object name?

This is a normal notation.

https://docs.blender.org/manual/en/latest/compositing/types/matte/cryptomatte.html

I know the cryptomatte proces, but this time it shows like you mention a normal notation. Perhaps I enabled a function or other. How to get is back to normal mode where object name is matt id?

I think this is what you are looking for (see video)