Minecraft 1.21.10-rc1

02 Oct 2025

A hotfix release candidate with changes to bubble column mechanics.

These writeups assume you have read the Official Changelog before continuing.

Table of Contents

• Bubble Columns

Bubble Columns

Entities are now only pushed by bubble columns if they are moving more than $1 - 10^{-5}$ blocks per tick, or the entity hitbox shrunk by $10^{-5}$ in all directions intersects the bubble column block. All throwable projectiles interact with all intersecting bubble columns on their first tick regardless of these conditions.