As of AppleCore 3.4.0 for MC 1.12.2 plus AppleSkin 1.0.9, with a high enough exhaustion cap, it is possible to get the exhaustion bar to copy itself multiple times, like so:

To reproduce:

1. Install the aforementioned mods. For easier reproduction, also install Scaling Feast 1.5.0 by @yeelp, which sets the exhaustion cap to Float.MAX_VALUE.
2. In the configs for Scaling Feast, set food cap -> Hunger Damage Multiplier to a value higher than 0.
3. If you have set Hunger Damage Multiplier to 1.0, then do /gamerule mobGriefing false (recommended) and then /summon creeper ~ ~ ~ {Fuse:0,ExplosionRadius:127}. This will cause you to take ~2,600 HP of damage, gaining over 10,000 exhaustion points in the process.
4. If you have set Hunger Damage Multiplier to 1000.0, then find or summon a hostile mob and let it attack you. This will also cause you to gain thousands of exhaustion points.
5. Take a look at the exhaustion bar.

Finally got new versions released, sorry for the delay.

I actually opened an issue here not too long ago about this (see #66) which seems to have been patched, but I don't think the patch has been released yet.

Duplicate of #66