Favorites symbol/icon changes itself



I noticed that when I add some POI to my Favorites and I change the symbol from the default black square to something else (i.e. House icon/symbol), that they change back to the black square after the unit has been powered back on. Not all of them changes. It appears to be a random thing.

Anyone have any idea/clue what is causing this and how can I stop this from happening? It's getting annoying for me to change the icon/symbol manually back after I had already changed it before.



I have had this occur when duplicate entries with same labels (names)are attempted in the favorites.
Any updates to the duplicate entry are ignored until the label (name) is changed to a unique entry.