Possible Yasou Bug?

Yasuo Misspelled in title. Had a question. Not sure if it is a bug or not but I found some odd interactions on his E. Specifically on bot lane, near the Tri bush. An enemy was positioned to the left of the bush near the small wall. I used my e to dash to them and deal damage, yet it sent me through the wall behind them. I don't know if this was intended to happen or not. This has happened several times. Once it saved my butt from a Trynd but also cost me a kill at the same token. Any info would be great. Thanks.