There are bunch of tech-entities in Mining Space Industries mod, like:
- tech drone (spawns within a quest),
- David the Synthetic (player-like fighting bot on player's force),
- Protomolecule humanoids and bosses (story-driven entities),
- maybe something else.

The problem is when they go below half health, they considered dead (or gone) and "death" triggers some events, which must be triggered on real death of an entity.
So my suggestion is either exclude those entities, so they can not be enraged, or rewrite logic (if it is possible), so already existed entity will gain enraged state with red tint, run and attack speed, instead if swapping on another premade enraged entity

/