Viscous ult does not stun/damage targets affected by Paradox's kinetic carbine (3).
Possibly related, but it did not stun/damage targets recently affected by Infernus' ultimate either.
Match ID 3113828
21:10 and 26:00 respectively
Most noticeably impacts:
-Leveling up skills with alt + number
-Assigning items hotkeys from shop (can no longer press the key, have to click on the corresponding key's box)