I'm playing a tournament and had only 4 games under my belt (allthough i played tons of Sabra Rummikub), but i got an error that i could not play more then 13 cards?!? Luckily for me, the next turn i could place the rest of my tiles.
But where in the rules can i read about this particular restriction? Or was it a bug and I should report it?
Nowhere online i can find anything about the restriction. It does prevent a little bit of hoarding.