Strange behavior where inside cluster doesn't match outside

can someone reproduce this weird behavior, where inside cluster all is ok, but collapsed it seems to have a mind of it’s own ?
I already restarted rhino, but behavior keeps occuring. No other gh file open in the background. I attached a simplified model
clusterf-ck.gh (29.9 KB)


This is due to the fact that a cluster processes empty branches differently. You can bypass this behavior by flattening the inputs, or matching the tree structure of both inputs.

There’s a few posts on this forum about this oddity.

I should have know this :face_with_open_eyes_and_hand_over_mouth: It was staring me in the face … now i know why i never use clusters, as everytime i try something unexpected pops up

Here is one of them?