Shader initializes incorrectly, only in multiplayer

[ffafe5]

What happened?

About 30% of the time joining a server, I get the attached screenshot for a result. That was using Bliss shader, but a similar issue occurs on MakeUp-UltraFast... what both issues have in common is that the sky fails to load in one manner or another. Since it's multiple shaders and just on multiplayer I wonder if the issue is in Iris. Singleplayer always works.

The server in question is one I set up myself with no notable mods besides Distant Horizons.

F3+R to reload shaders fixes it every time, and I can reload dozens of times and it doesn't break, so the scope of the issue is only when joining a server, not just the fact of being inside of a server. I would settle for some kind of mod solution that automatically reloads shaders after they initialize the first time, but I couldn't find any such mod.

Versions:
Minecraft: 1.21.1
Fabric: 0.17.3
DistantHorizons: 2.3.6-b
Iris: 1.8.8
Bliss shader: unstable channel
MakeUp-UltraFast shader: 9.3e

Screenshots

Log output

No response

Minecraft Version

1.21.1

Iris Version

1.8.8

Operating System

Windows 10

What is your GPU?

NVIDIA GeForce RTX 3080 Ti

Additional context

No response

[ffafe5]

I think I've created a duplicate of X0nk/Bliss-Shader#451 , which is to say the manifestation is the same. That author says that their shader isn't the culprit but rather the common issue (whatever it is) looks pretty unique on that particular shader. The vibe I get is that the exact root cause (for multiple shaders) is unknown but is probably strongly linked to Distant Horizons.

[ffafe5]

Observed again with more shaders including "Complementary Unbound" in the form of the sky just not drawing anymore. As before, reloading shaders "fixes" the problem. I don't know anything about minecraft modding so excuse my ignorance, but could there be a race condition in setting up the graphical back ends of DH versus the sky background by Iris shaders?

[ffafe5]

A user of another forum reports the same issue on Photon v1.2a reproducing reliably any time they resize the minecraft window, if that means anything to anybody.