Jax E and Udyr E

So, I was playing a game as Udyr top, vs a Jax. Now, before, this could have been a safe lane, because even when Jax jumped on me, I could bear stun and run and avoid his combo, because my stun would go through his dodge, but the damage wouldn't. However, this no longer applies. I didn't see anything about this in patch notes, was the fact that it could be done before the bug, or is it a bug now that he can't? Also, what does this mean for the Nasus interaction, where Nasus' Siphoning Strike would go through his E?

How to Replicate: Jax hits E, Udyr tries to stun him. Stun timer doesn't even apply like it does to failed stuns (Say, Teemo blind).