Just loaded up 1.21.8, using Lithosphere for terrain generation. Haven't had problems with it in 1.21, but for some reason DH LODs create strange grid like patterns in the ground that don't actually exist.
I haven't changed any mods since playing in 1.21 to 1.21.8, the only exception being ModernFix is disabled as there's no 1.21.8 release.
Attached are screenshots and a warn/error message that repeatedly shows up in the game's output log.
Mod list:
[EMF] Entity Model Features
[ETF] Entity Texture Features
3D Skin Layers
AmbientSounds
Amplified Nether
AppleSkin
Architectury API
BadOptimizations
Better Birch Forest
Better Clouds
Better Days
Better Third Person
Camera Overhaul
Cave Dust
Chunky
CICADA
Cloth Config API
Continuity
Cool Rain
CreativeCore
DH
Do a Barrel Roll
Dynamic FPS
Entity Culling
Essential Mod
Euphoria Patches
Fabric API
Fabric Language Kotlin
Falling Leaves
FerriteCore
First-person Model
Fzzy Config
Geckolib
ImmediatelyFast
Immersive Storms
Indium
Iris Shaders
JamLib
LambDynamicLights - Dynamic Lights
Lithium
Lithosphere
Mod Menu
ModernFix [DISABLED]
More Culling
Not Enough Animations
Particle Core
Particle Rain
Presence Footsteps
Reese's Sodium Options
Shut Up GL Error
ShutUpDeadEntities
Sit
SmartBrainLib
Smooth Scrolling
Sodium
Sodium Extra
Sound Physics Remastered
Still Life
Subtle Effects
Text Placeholder API
Tooltip Scroll
Visuality
WI Zoom
WorldEdit
WorldEdit CUI
YetAnotherConfigLib (YACL)