So this is still bugged, only solution I found to negate this is 
Create Conditional Button that requires 30 wood, hide both button and hologram.
Create Health Powerup that heals amount that you want.
And place Campfire just for looks, you can light it up with Conditional button, you can even make Timer Device that turns it off after a while.
Its 4 devices instead of one, hopefully they see this and realize it’s an actual bug , you don’t even get healed if you’re in a Class.
If anyone from Fortnite is reading this: I have survival map where people would want to light a fire to heat up “heal” because they are constantly loosing HP. I wanned to make class system for different levels of classes, so that I can let through the tougher zones Class 2 but still damage a lot Class 1. That’s only 1 example.
Anyway @GraemeBB I hope this helps with anything you’re working on.