C/T? label appears after 2D cleaning benzene in JMSketch

The label "C/T?" appears sometimes after I 2D clean a benzene ring. (You have to drag one of the C atoms far enough from the ring in order to get the label created.) What does the C/T? label means in this context?





Marvin 4.1.2





Thanks


Peter

"C/T?" means CIS or TRANS or unspecified. This is a query feature.


I cannot reproduce this bug dragging far away a C atom.


But I know that this can happen in some situation.