I was ecstatic to find this mod because I've been looking for ways to improve my visual experience on multiplayer servers. I tried this mod on one small SMP I'm on and it seemed to work during one session - Indeed, after wandering around a lot and then reloading resources using F3+T, I could still see much, much farther than usual. However, after logging out and back in to the server, the effect is gone. It's back to the measly 4-5 chunks it was before.
Does this mod only keep the cached chunks during one session?? Or is it supposed to store them permanently? I was hoping I would be able to log into the server and instantly have 32 chunks, or even 64 chunks with Optifine, instantly render after only visiting them once before. Considering how ephemeral a single online session is, it seems essential that the mod should save and reuse the cache between sessions.
I would like to see more specific documentation about the functions of the mod on the Curseforge page, especially information that could help convince server administrators to allow the use of this mod on their servers.
Thanks.

yes the chunks are kept in the client-side world after they've been loaded once, so if you disconnected those will get unloaded too.
There is not much to explain really, it simply does not instantly unload chunks on the client side once you go out of the servers view distance