[i_love_limes]

I ran into this too. I run a very silly slack bot for my friends, and it randomly cycles through pictures that we all have created. Initially it was completely random choice per invocation. Had to change it to a randomly sorted list that was then stored and iterated through until the list is depleted, then it's re-randomised. For the same reason, complaints that actual random choice chose duplicate pictures too often

[KMag]

Note that if your playlist is append-only, you can use format-preserving encryption and just store a seed, a counter, and the length of the list when you started, instead of storing the whole shuffled list.