mojira.dev
MC-166437

Interaction with multi-blocks in spawn protection creates desync

The bug

Interacting or breaking certain multi-blocks as non-op player in the spawn protection causes desync.

Affected blocks

  • Right-clicking wooden door

  • Breaking double chest

  • Breaking tip or middle piece of

    • Kelp

    • Twisting vines

    • Weeping vines

    • Dripstone

    • Cave vines

  • Breaking piece below top piece of big dripleaf

  • Breaking parts of a redstone wire

Reproduction steps

  1. Start a server

  2. Op any player other than you (from the console) to activate spawn protection

    /op Notch
  3. Join the server and try to break or interact with multi-blocks listed above within the spawn protection
    ❌ Either the broken block or the other half does not update correctly

Related issues

Attachments

Comments

migrated
[media][media][media]
violine1101

There have been a lot of tickets about this already, however they have been resolved as invalid iirc (as in "cannot interact with blocks in the spawn protacted zone"). Might make sense to have a ticket for the desync only though.

marcono1234

Can still reproduce in 20w51a for some blocks and have updated the report accordingly.
However, cannot reproduce anymore for breaking doors or beds.

migrated

Affects 21w05a
Also affects big dripleaf and cave vines. small dripleaf seems unaffected.

Avoma

Can confirm in 21w18a.

Avoma

Can confirm in 1.18.1. This seems to affect all blocks that can have their block states altered depending on nearby blocks, for example, iron bars, glass panes, tripwires, double chests, stairs, etc... I've provided a video that demonstrates this behavior occurring for visual purposes.

[media]
Avoma

Can confirm in 1.18.2.

Avoma

This issue was present in 1.18.2, but no longer occurs in versions above or equal to 22w11a. With that being said, this issue has been fixed in 22w11a.

marcono1234

(Unassigned)

Confirmed

Low

Networking

spawn-protection

1.14.4, 1.15 Pre-Release 2, 1.15.1, 1.15.2 Pre-release 2, 1.15.2, ..., 21w05b, 21w18a, 21w20a, 1.18.1, 1.18.2

22w11a

Retrieved