I used a cheat table for passive skills right before going into ethel's swamp: Even the redcaps ended up insta-dying. Not sure how cheat-engine messes with the game's memory, but I believe the game hiccups trying to find whom to give the passive skill to when something transforms. Then it kills whatever isnt in the player's party, hence the instadeaths.
Update as of writing this, I was sorta-right. People over on cheat engine forums are talking about temporary workarounds like giving whatever person who transform globes of invulnerability:
https://fearlessrevolution.com/view...2edd97c82dd80706d9d7f2a24&start=7065
