Minecraft Version: 1.16.5 (Forge)

Overloaded Version: Overloaded-1.16.4-0.0.95.jar (however the bug also exists in the version beforehand)

When you wear the multi armor, then take it off (unsure if you also have to take damage while wearing it or while only wearing parts of it), taking damage will result in you assuming the "death state" (red and tilted sideways), sometimes there will even be the "You died" screen coming up, however hitting "respawn" will simply resume gameplay.

You don't lose your items when this happens, also I've noticed that if you have a mod to display an overloaded health bar (like "armor toughness bar", "overloaded armor bar" or "health overlay") the hearts will stay a different color as if you still had the extra health, but will revert to red once you take damage and "die", also if you have Journeymap, a death point will be created.

I tested this on a fresh instance with only this mod installed and no settings changed, and it's still observable.