Stretched Cluster Constant Bug

[X.]

I found this on my diagram:

I don't suppose this is intended, but it is definitely cute.

Double-click on it back and forth and it reverts to the standard icon size:

How did I obtain this?

This is my quizz of today.

[Jacobson-ni]

I tried to figure this out in 2014 and couldn't do it.  If I double clicked the constant it goes between the normal constant size you see and the BD constant that shows the individual items, but are you saying that if you double click the constant it just gets bigger and smaller?

I'll try tomorrow in 2013 becuase I enjoy silly visual bugs.

[X.]

No, after expanding to show the full cluster, another double-click reverts to the icon mode, but now it has the normal size: