I noticed it recently that whenever items go into the Null, my UI disappears. I don't know if it's conflicting with "Mine And Slash" or not but this didn't use to happen.

No items:
https://i.gyazo.com/0b201229995f560a05d8b8be926089a2.png

With items:
https://i.gyazo.com/d53e734a61847c239932149ee4525a16.png

EDIT: I have done some tinkering and found that the preview config option being turned off fixes this issue. Figured I'd edit this in case anyone else has this issue.

Not disappearing in adventures of halk so mod bug likely

doesn't seem to be an issue in modern versions

that's annoying, wonder what's causing it since it's not happening in the modpack I'm playing adventures of halk.

I don't know. I'm using a mod called "Mine and Slash" that adds more bars to the side. Once I got rid of the preview in the Dank config the UI disappearing stopped.

full modlist? because I'm using Mine and Slash as well and it's not vanishing

Advanced Rotten Flesh to Leather
Angel Ring
AppleSkin
Biomes O' Plenty
Building Gadgets
Coal Chunks
Corail Woodcutter
Curios API
Cursed Earth
Cyclops Core
Dank Storage
Dungeon Crawl
EverlastingAbilities
Extra Bows
Fast Leaf Decay
GemsPlusPlus
Gobber [FORGE]
Hwyla
Inventory Sorter
Iron Chests
Just Another Rotten Flesh to Leather Mod
Just Enough Items (JEI)
Light Level Overlay Reloaded
Linked Destruction
MCFurnace
Mine and Slash
MoreOres Mod
Mouse Tweaks
Placebo
Ring of Attraction [FORGE]
Ruins (Structure Spawning System)
Scalable Cat's Force
Silent Lib
Simple Farming
SimpleHarvest
Speedy Hoppers
Storage Drawers
Torcherino
Treasure Bags
U Team Core
Useful Backpacks
Vanilla+ Tools
VoxelMap