Minecraft 1.19.1 Pre-Release 4

This pre-release fixes an exploit found regarding contextual chat evidence when creating a Player Report.

Technical changes in 1.19.1 Pre-Release 4

• Custom servers can hide player chat messages from display via a new network packet
  • This does not delete player chat messages from chat logs
• Insecure chat messages logged in the server are prefixed with a [Not Secure] tag
• The order of chat messages are now cryptographically verified
  • This will be used for validating the context of chat messages for Player Reports

Fixed bugs in 1.19.1 Pre-Release 4

• MC-253743 The server console doesn't state if chat messages aren't secure or have been modified
• MC-253813 Chat commands with entity selectors often reported as "This message is not secure"