Issue Description:
Dynmap consume too many memory.
I have launch a fullrender of a flat map. but I will have some memory warning fromFAWE.
So i have checked the memory and dynmap consume 6.75 GB + 1.13 GB GB https://spark.lucko.me/EOVzlTNUXU
In consequence, i have stop (with cancelrender) and purge the queue (purgequeue)
But the heapsummary don't move.

We have 6 minecraft map with 3 rendering: flat, sw and se
Internal server web is disabled and i use a caddy server for web interface
https://supersamaworld.com/dynmap/build/

On configuration I have

• Dynmap Version: 3.1-457
• Server Version: Tuinity 1.16.5 "a0aa5ab"
• Pastebin of Configuration.txt: https://pastebin.com/mfWbq7U6
• Server Host (if applicable): Dedicated server AMD Ryzen 9 5950X 24 theads,, 126Go RAM, 4To SSD Nvme
  Virutal server : No CPU limit, Docker RAM : 30Go, JVM RAM: 25Go
• Pastebin of crashlogs or other relevant logs: No logs
• Other Relevant Data/Screenshots: memory heapsummary : https://spark.lucko.me/EOVzlTNUXU
• Steps to Replicate: Sorry i don't know the origin

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

Dynmap does not support Tuinity and there are known memory leaks when Dynmap runs on Tuinity. As of now, there are no plans to add support for Tuinity.