Figure I give it a mention here as well, just in case.

Minecraft: 1.12.2
Forge: 14.23.5.2824

Mods: 2
PotionCore-1.6_for_1.12.2
RandomThings-MC1.12.2-4.2.7

If you have Potion Core installed, the Lava Charm HUD acts as if there's an invisible bar under it.

If I uninstall Potion Core the HUD will look like this.

P.S.
Would it be possible to allow one to move the Lava Charm HUD via a config? Like if I wanted to move it somewhere else in case the default location gets crowded or something.

Tfarcenim/OverloadedArmorBar#4

Figure I link this issue here since it's sorta the same issue, only the Lava Charm Bar no longer renders if "Overloaded Armor Bar" is installed.

Top:
Lava Charm Bar doesn't show if Overloaded Armor Bar is installed.

Bottom:
Lava Charm Bar shows if Overloaded Armor Bar isn't installed.

So if using Potioncore's Armor Rendering... the Lava Charm Bar is bumped up. If using Overloaded Armor Bar's Armor Rendering... then the Lava Charm Bar no longer shows at all.

EDIT
This was fixed on Overloaded Armor Bar's side.

Heads up, I fixed it on my end.

Yea, Overloaded Armor Bar's issue was fixed, just forgot to post an update about it.

There' still the issue with Potion Core's Armor Bar where the Lava Charm is bumped up slightly.

Fixed in version 1.9 of potion core