Why did Onslaught go unstoppable in BGs?
I don't have a video, but I just faced off against Onslaught using my Silk in VT of BGs.
I pushed Onslaught to SP2 and had Silk's evade activate to dodge all hits of his SP2.
After the final SP2 hit was evaded, I dashed in to counter, but Onslaught was unstoppable (I saw the Unstoppable icon and the text pop up, he ignored my hit and just attacked).
I believe I have experienced this another time previously (in a different BG season). I tested Silk against Onslaught in Practice mode, and was able to punish his SP2 after evading, without unstoppable appearing.
Is there some part of Onslaught's kit that I am not seeing, is this a node ability, is this a player's mastery setup, or is this a bug?
One other thought would be that BG's server timing makes it so that BG Onslaught is considered still in the midst of the SP2 animation as opposed to a neutral 'hittable' state, and so the game doesn't register my SP2 punish as having the correct timing.