PortalMine owner documentation. Test important changes on a copy and keep a verified backup.
Server-owner summary: Preview 26.40.30 is for isolated Bedrock testing. Keep production worlds and public players on the stable release.
What the preview contains
Mojang published Minecraft Preview 26.40.30 on July 7, 2026. It includes experimental features for a later game drop, including the cushion and straw bed. Preview notes can also contain fixes and creator-facing changes that are not yet part of the stable Bedrock release.
Why preview compatibility is uneven
Preview clients, dedicated server builds, add-ons, and community Bedrock implementations do not always update together. A client connecting successfully is only one test. Add-ons can still fail because of changed components, experiments, pack versions, or unsupported behavior.
A safe Bedrock preview workflow
- Export the world and keep the original outside the test server.
- Create a separate preview server and UDP allocation.
- Use the exact matching preview client and server build.
- Enable only the experiments required for the feature being tested.
- Test resource packs, behavior packs, scripts, permissions, and reconnects.
- Save logs and list every pack version before reporting a failure.
Planning for the stable release
Do not schedule a production update from a preview article alone. Wait for the stable changelog, confirm a matching server build, review add-on compatibility, and repeat the test on a fresh copy of the current production world.
Primary sources
PortalMine summarizes the operational impact for server owners. Version-specific facts are checked against the original publisher.