Server.properties bug - non-admin players get kicked for spam when sending a single message

Expected behavior

Setting either 'chat-spam-threshold-seconds' or 'command-spam-threshold-seconds' in server.properties to 0 prevents players from being kicked for spam when sending chat messages/typing commands.

Observed/Actual behavior

On Paper servers, setting these properties to 0 makes it so you can't send any chat messages/commands at all without being kicked from the server for spam.

On vanilla, however, setting these properties simply makes it so players no longer get kicked for spam, as intended.

Steps/models to reproduce

Create a new Paper 26.2 server and set both 'chat-spam-threshold-seconds' and 'command-spam-threshold-seconds' to 0
Start the server
Without being opped, send a single message or type a single command and see what happens.

Plugin and Datapack List

No plugins or datapacks apart from the built-in ones: [vanilla (built-in)], [file/bukkit (world)], [paper (built-in)]

Paper version

[16:13:54 INFO]: Checking version, please wait...
[16:13:54 INFO]: This server is running Paper version 26.2-84-main@26e81c4 (2026-07-26T18:11:33Z) (Implementing API version 26.2.build.84-stable)
You are running the latest version

Other

No response

Reproduce on a Paper 26.2 server using both server.properties thresholds set to 0, then send one chat message and one command as a non-opped player. Compare the behavior with vanilla and trace the server's spam-check handling for these settings. Done means each single message or command is accepted without a spam kick, matching vanilla behavior.