Defender-type Grunts get Overshield so they have 4 effective HP instead of 1. But they don't have an explicit exception to the effect where receiving any heat destroys them. Do you think they should take heat as energy damage instead?
Viewing post in Lancer: NPCs Rebaked comments
Nah, that interaction was expected and kept in mind while designing them, they're still grunts at the end of the day. Same as how Controller type grunts still pop with a single point of damage but are more resistant to taking heat. It pushes the approach to handling them more towards one direction, but not every mech is as good at hacking as they are at shooting and vice versa.