title. we uninstalled Sodium off of our Crucial 2 server because it was causing issues with other mods and functionalities (investigating a memory leak and ) and now we have funny/ugly chunk borders :/

It might be lithium
You didn't remove any other worldgen mods did you?

nope, just sodium. it was, in fact, the lithium part of halogen, from what we could tell, which we didnt even realize was a thing. it does cause some issues and incompatibilities though if someone who isn't really savvy with config files, for example, installs sodium but then wants to continue playing on an old world

Maybe it's not documented enough but in the config file there's an option you can enable for vanilla seed parity.