I have a molecule within a cell. The first time I open the Cartesian editor, all the coordinates (fractional) are seemingly correct. However, if I translate the molecule within the cell without closing the Cartesian editor, one of the atom coordinates changes to (0,0,0). If I close the editor before translating, then there is no problem, the coordinates are not changed to zero.
I have the atoms ordered according to element type, and the atom whose coordinates are changed is the first hydrogen in the list. I don't know if this is significant.
The obvious workaround is to close the Cartesian editor before translating and then reopening to copy coordinates to an external file.