Blasting Smite Doing Damage?
Gyazo
http://gyazo.com/bb943b2a9be80d3f22384229047badd7 It reads that blasting smite did 3 damage to me
http://gyazo.com/bb943b2a9be80d3f22384229047badd7 It reads that blasting smite did 3 damage to me
There have been a lot of weird kinks and stuff with Death Recap.
What you saw is likely a bug with Death Recap, but it may not actually get fixed until Riot can create a better Death Recap.
Also, you can definitely tell that Blasting Smite would not have been what dealt that damage to you because it said it deals magic damage. Smite deals true damage, and Blasting Smite cannot damage champions.