Hi. I use this mod to capture and archive some server maps, however there are some potentional issues I think. I use Minecraft 1.21, Fabric loader, with ViaFabricPlus 3.4.5 and a modified fork version of WorldTools from https://github.com/RyuguDev/WorldTools-1.21.1 (PR #45). I join a 1.8 server on 1.21 client with the help of ViaFabricPlus.

The server, as far as I know, utilizes some hacky approaches to send custom packets. As shown in this picture, partially because of ViaFabricPlus, a fake, invisible wither entity can be seen. In addition, a fake ender dragon entity lies below, which is always pined at an y and follows player's x and z:

I walk around to capture all the chunks I could reach. Chunks capture is successful, yet tons of redundant, unwanted entities are captured as well. As a result, I have to run /kill twice:

In the mod's config screen, I turned off capturing entites and tried again, still the same result. To my understanding, having the following config should leave literally everything else but chunks information. Since I just want those blocks, is there a bug in this mod's configuration, or is it simply because of me doing something wrong?

Logs:
capture.log

No you are doing nothing wrong this is a bug. Due to some code changes it was forgotten to check for this setting again.