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Update to 1.21.9
Update to 1.21.6-1.21.8
Cloning TNT entities using NBT for accurate preservation of properties (including fuse, owner, velocity); Implementing a maximum queue size to prevent memory exhaustion; Implementing logging for debugging and monitoring queue status and discards;
Now it's queued up, not "frozen"
Now you can use the config command if you are operator.

The mod is designed to limit the number of simultaneously active primed TNT entities.