GenericDialog.addToSameRow does not work with Message element

Trying to add a checkbox to the same GUI row than a Message item fails, the checkbox is not displayed at all :sweat_smile:
Example jython code below, comment the line addToSameRow to get the checkbox.
Is it a known issue ?

from ij.gui import GenericDialog

Win = GenericDialog("Test")
Win.addMessage("My Message")
Win.addToSameRow() # bug -> check box not displayed
Win.addCheckbox("My Boolean", True)