Random is just a poor man's Shuffle.
Random tries just to pick a song at random, using a random number generator and songs can get repeated at any time.
If it is poorly programmed you will get repeated patterns of songs, random is used where no playlist exists.
Shuffle on the other hand will take your whole music collection and shuffle it just like a pack of cards (play starting at the top and working down) so that no songs will ever get repeated in a session, the shuffled songs are stored as a playlist on the player.
The better players will always have the Shuffle option.
My old Rockchip player had the random play and my new RK2706 player uses shuffle and I found the shuffle works perfectly.
Like makd511 said, better to get a new player that has the proper "Shuffle" and NOT "Random"
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