The newest patch brought a change that made stun chaining less devastating by making stuns more consistent and changing the way they’re calculated.
However it seems to have brought some (possibly unintended) changes to Ana’s sleep dart as a result.
First: lying targets now have an active hit box. This means a sleeping target CAN body block you. I still need to test whether a Rein-shattered player can body block you as well.
Second: Ana’s easy shoot-nade-shoot combo is no longer possible because the wake up animation has been made more consistent along with the stun changes. To clarify, letting a target wake up naturally used to cause their wake up animation to be slowed down, giving you just enough time to kill them without them being able to move or use cooldowns. Now, they will always use the faster wake up animation, regardless of whether you hit them or not, meaning they will always be able to move before you fire the second bullet.