See my similar issues here
I noticed that the freezes are more or less frequent depending on which skin I use. With default skin Estuary the freezes are less frequent. With Estuary MOD v2 it freezes all the time just while navigating the GUI.
I also booted from SDCard after some intial problems, see here Can't install from SD card to EMMC on Odroid N2+ but no change, still some freezes.