Rahilda ignored protection from red
Blocked Rahilda, Feral Outlaw with Clever Lumimancer, cast Sejiri Shelter and gave protection from Red. Rahilda killed my creature anyhow?
No instants used by opponent to interact.
I have the same bug with a Goblin Chainwhirler who kill with combat damage a Cerulean Drake without other interaction.
The game doesn't see the backside of Rahilda as red, it doesn't give it a color sadly