Bug description
From what I understand, the scalingHealth config allows you to disable the default Identity behaviour of setting a certain number of max hearts specific to the identity you're using. Unfortunately, it doesn't seem to be working on 1.20.1 Fabric. Tried on an environment with no other mods and got the same result. Max health is still modified after swapping identities.

Maybe I don't understand the option, but is there a way to disable that feature? I would like to keep the vanilla number of hearts.

Ok, turns out it was an issue in my config file. I had set requiredKillsForIdentity to a really high number (since I don't think you can disable the mechanic that forces you to kill mobs to get their identity any other way?), and it probably broke the config file. scalingHealth seems to work once I lowered those numbers!