Improper cleanup of chunks

[AdiihYT]

Describe the issue
Lately I'm getting these annoying warning messages in the console about improper cleanup of chunks.
I'm using SlimeWorldManager to handle my minigame worlds (SRF format, nothing special), I'm not sure if this issue is SWM-related or not, but it's spamming my console continously.
If it's not SWM-related, then please forgive me.

I tried to find potential solutions to the problem here and on other forums, but I couldn't find anything useful.

Spigot version
git-Paper-387 (MC: 1.18.2)

Plugin version
2.8.0

How to reproduce
Just load in any chunks in an SRF-world.

Crash reports (if available)

[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (-1, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (0, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-4/WARN]: Improper cleanup of chunk at (2, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-5/WARN]: Improper cleanup of chunk at (-2, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (1, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-5/WARN]: Improper cleanup of chunk at (13, 0). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-12/WARN]: Improper cleanup of chunk at (13, 1). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, -3). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (13, -1). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-13/WARN]: Improper cleanup of chunk at (13, -2). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (-3, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (3, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (13, -4). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, 2). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (-4, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-13/WARN]: Improper cleanup of chunk at (4, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (13, -5). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (13, 3). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (-5, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (5, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (13, -6). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (13, 4). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (6, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (-6, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, -7). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, 5). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (-7, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (7, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, -8). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (13, 6). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (-8, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (8, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-13/WARN]: Improper cleanup of chunk at (13, -9). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-3/WARN]: Improper cleanup of chunk at (13, 7). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (-9, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (9, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, -10). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, 8). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (-10, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (10, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, -11). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-8/WARN]: Improper cleanup of chunk at (13, 9). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (-13, -12). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (-11, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-4/WARN]: Improper cleanup of chunk at (11, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-4/WARN]: Improper cleanup of chunk at (13, -12). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, 10). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (-13, -13). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (-12, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (12, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, -13). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (13, 11). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-1/WARN]: Improper cleanup of chunk at (-13, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, -14). Reusing NMS chunk
[20:55:27] [ForkJoinPool.commonPool-worker-14/WARN]: Improper cleanup of chunk at (13, 12). Reusing NMS chunk

[tatteaid]

Have you tried using the latest build in the Discord server (under the #new-builds channel)?