Chat Lag Fix

When a player receives a chat message, the game sends an HTTP request to check the sender against the block list. The request is made on the render thread, so the current frame cannot finish until the response returns, which causes a visible lag spike. This mod removes that wait so chat messages come through without stalling rendering while the block list is fetched.

The problem was tied to changes in Mojang's API, which began returning errors for some users, and to migrated Microsoft accounts that had their block list fetched at two-minute intervals. The author documented the cause in a comment with a walkthrough of the technical details. A Mojang employee confirmed the bug was fixed, and the author notes that it still affected 1.16 and 1.17 mainly on the first chat message received.

The mod is published for Fabric only, for the game versions 1.16.4 – 1.18.1. The latest file, mc1.17-2.1.0, targets 1.17.1. The author notes that the fix is no longer needed from 1.18 on, because the issue was resolved in the game itself.