In the Segment browser, the segments cannot be renamed via the "Rename segment" option in the Action bar.

Upon selecting the "Rename segment" option, a dialog will open prompting for a new name, but hitting the "Save changes" button will not rename the segment. Invoking the dialog again one can see that the dialog preserves the new name but hitting Save again still does not save (change) the name of the segment.

Renaming a segment works only through the "Edit segment" option > "BASIC" tab.

My guess is that the problem may rest in the "renameSegment" item extending the "../editFolder" property, which probably cannot be applied to editing (renaming) non-Folders.