What happened over here?

I was fighting a Metal Paladin in Elysium, and being an Asian I had worse ping since it was an EU server.

We both used snare at the exact same time, I saw his snare effects register on me but it did absolutely NO damage and then my poison snare registered with damage and knockback.

My snare had cancelled his, but how did it come first with worse ping? How does snare even work?