[2020] Thwart the Enemy interaction

Possible bug with the client, perhaps to do with the way [[Thwart the Enemy]] is written.

I cast Thwart the Enemy after attackers were declared. Blocked my opponents [[Serrated Scorpion]], which subsequently dies in combat. Its death trigger goes off and deals 2 damage to me. From the wording on Thwart the Enemy, I believe that 2 damage should be prevent. Maybe its programmed in the game to only prevent combat damage.

Am I missing something between these 2 cards and the ability of Serrated Scorpion's death?

EDIT: Looks like it has been submitted to Arena support as a possible issue. At least let this be a PSA if it is a bug, so you can play around it if possible.