Live Plus and MP4s with Chapter Markers

Live Plus unit I have recognizes chapter markers in MP4 files.  Can someone confirm that this is the case?  I am using the firmware that came with the unit.  I ask the question because I seem to remember (and I may be wrong) that the chapter marker option was disabled for MP4’s that I know have chapter markers when I first used the unit.  Again, I am not so sure now.  Then it started working.  As though a piece of the software got initialized correctly.