Minecraft 1.21.10-rc1

Everything below is measured by comparing the game files of 1.21.9 with 1.21.10-rc1 — not copied from patch notes.

Read from Mojang’s own release notes for Minecraft 1.21.10 Release Candidate 1, published 2025-10-02. Every entry keeps its original bug ID.

6 issues fixed, read from Mojang’s own patch notes. Each entry keeps its original bug ID.

Fixed bugs in 1.21.10 Release Candidate 1 6

• MC-211096 Entities in cobwebs clip though pistons
• MC-278182 Items glitch inside the piston head when pushed through powder snow or cobwebs
• MC-301916 The behavior of wind charges when colliding with certain blocks is different
• MC-302321 Chunks don't load while the player is being teleported
• MC-302383 Rooms with carpet on the floor cannot have maps in item frames placed on walls touching the floor
• MC-302405 Repeating(or chain) command block with any form of /tp [player] doesn't constantly tp player to one spot

This build was part of the run-up to 1.21.10. Everything tested here landed in that release.