[GAMEPLAY]I think there's a bug on shen

This happens when i put a little attack speed on Shen when he attacks a plant, or . Is this a bug or some kind of annoying mechanic on Shen? It cost me a life I was running away from the enemy team in the river and i decided to try and heal using the fruit and i missed 2 times. To reproduce the bug i think you have to give shen more than 1.00 attackspeed This happened in 2 games.