Don't know what to tell you, I tried it with the exact same health options and gear you have and it works for me. Last thing to do is to fully uninstall realism and reinstall. That means deleting the .dll in the plugins folder, and the config in Bepinex/configs too.
Or maybe it's one of the other mods conflicting, first thing to do when having issues is to remove other mods to see if there's an issue there.
I deleted everything and started a new character. Seems to work now... Idk what happened but now I started with the Realism Med System OFF from the beginning.