Predator Kayn, Cant Buy Items.

I was trying out Kayn Jungle with predator keystone , everything was fine for first few backs , but after some time I could not buy duskblade even though i had both components and sufficient gold . I tested this out in Practice tool and same outcome . I'm guessing its predator that is glitching it , because its icon is bugged itself , plus with every other keystone it seems to be fine . (This was same with every other item that required components , and at some point i could not even buy components either . )