Issue: Bobby does not load chunks from bobby-fallback folder

Folder is located in minecraft/saves, called bobby-fallback. Windows won't let me delete the folder when I am in the server, saying it is in use, which suggests it is in the right place. However, the game only shows chunks that I have been sent and does not show chunks from the bobby-fallback folder.

The bobby-fallback seems to work in singleplayer (normal world chunks are rendering far off in a superflat world) but it is not working in multiplayer (the chunks the server has sent the client are being rendered, it is just the bobby-fallback that is missing).

ftr: I'm unable to reproduce this.

My best guess (which would explain the SP/MP difference, cause the code is the same for either case) is that your server uses a different dimension than your bobby-fallback world. The dimension matters. To check for this, have a look at your F3 screen: The dimension (e.g. minecraft:overworld) is displayed in the last line of the first block on the left side (before FC: ).
Also make sure your world is fully updated to whatever Minecraft version you're using (Singleplayer -> Edit -> Optimize World).

Additionally, if anyone runs into this and none of the above is the issue, please attach your latest.log file after joining the server.

(local vanilla server with view-distance set to 2 and an arbitrary fallback world)

The problem is occuring on 1.17.1, I haven't tested the 1.18 version
latest.log

Hm, I unfortunately don't see anything of interest in that log.
Could you take a screenshot on your server which clearly shows the fallback world missing with the F3 screen visible, and then, without restarting MC, the same thing (also with F3) at the same position in your fallback world? Please also attach the resulting log.
And for good measure, also a screenshot that shows how you have renamed your fallback world.

I think the problem was that the fallback world was generated using starlight and I didn't have starlight when using bobby