Shaders broken on purpur servers

Shaders work fine in singleplayer worlds, fabric servers, vanilla, etc. but for some reason on purpur servers they break.

On purpur servers, the end and nether use the overworld settings, making everything look... awful.
Some other people on the server I'm playing on are also having the same issue.
I tried with my modpack I'm using and with only sodium and iris, still the same issue

Attached pictures are singleplayer in the end, and the purpur server also in the end. I tried using f3 to show I was on a purpur server but it doesn't show it :<
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