Frost Queen's Claim and Yasuo are disabled for a long time now due to bug. What happened?

How come they have been disabled for so long? Theres some nasty bug about frost queen and yasuo? Please guys i just want to know whats wrong with them i want those 2 things back I just like to play Yasuo. I get tired of playing Riven sometimes =( also the Frost Queen is a crucial item =(
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