Issue Description: I've loaded using chunky an area of 4096 blocks of radius, so 512x512 chunks, and the chunky logs showed that when it finished loading all the chunks it was arround 262k, which is 512x512, but on Dynmap only a 256x256 area shows.

• Dynmap Version: 3.7-beta-8
• Server Version: Paper 1.20.1 latest
• Pastebin of Configuration.txt: https://pastebin.com/MZ65vH2A
• Server Host (if applicable): Selfhosted, running on localhost on my PC
• Other Relevant Data/Screenshots: **
• Steps to Replicate:
  • Download latest version of PaperMC 1.20.1
  • Install Dynmap 3.7-beta-8 and Chunky 1.3.146
  • Enter the commands:
    • /chunky spawn
    • /chunky radius 4096
    • /chunky start
  • After it ends, enter: /dynmap fullrender world

[ ] I have looked at all other issues and this is not a duplicate
[ ] I have been able to replicate this

Runned a second time the fullrender and it rendered the rest, my bad.