Ezreal cleptomancy

Today something really weird happened to me ,while i was playing ezreal ,it may be bug or smth ,but i got an "Elixir of Skill " , so basically i was lv 6 and i got a free lvl up skill =)) ,was really weird to be lv 7 but still lv 6 =)) ,you know what i mean , so i am wonder if it's something normal or just a bug ??? https://ibb.co/sytGXtK
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