1.21.5 clients are kicked when particles are shown while client has fabric api

[Kichura]

/viaversion dump Output

https://dump.viaversion.com/6980edf5de81ac95c8a7866d3cc137b9c65ebf219962d35dc70a675dc24b6ab5

Console Error

Missing 1.21.5 blockstate for 1.21.6 blockstate -1

Bug Description

When joining a 1.21.6 server while the 1.21.5 client has Fabric API installed, the client will get kicked when landing onto the ground. (for example)

Steps to Reproduce

1. Make a fabric 1.21.5 client that has Fabric API and nothing else,
2. Make a fabric 1.21.6 server with the ViaFabric's preview build and 5.4.0's preview build installed,
3. Join the server,
4. Fly up for a bit then fall down.

Expected Behavior

You will not get kicked once particles are played.

Additional Server Info

1. This server does not use any proxies,
2. The client is fabric 1.21.5 wth Fabric API 0.127.1+1.21.5 - Meanwhile the server has Fabric API 0.127.1+1.21.6 with ViaFabric's preview build and ViaBackwards+ViaVersion 5.4.0-SNAPSHOT preview,
3. No, The client does not use viafabric.

Checklist

• I have checked if this is specific to ViaFabric platform, and doesn't happen when running it on other platforms (Paper/Sponge/Velocity/Waterfall).
• I have included a ViaVersion dump.
• If applicable, I have included a paste (not a screenshot) of the error.
• I have tried the latest build(s) from https://ci.viaversion.com/ and the issue still persists.

[compieter-gh]

I have the same issue.

[compieter-gh]

Its weird cause when getting hit by a sword etc it doesnt trigger but when getting fall damage it does.

[szimione]

Is it fixed?

[compieter-gh]

no

[compieter-gh]

@kennytv Im pretty sure this issue is coming from viabackwards. but the weird thing is its fixed when removing the fabric api.

[Riyuukii]

this also happened on 1.21.7 server with 1.21.5 java client with the following error: Missing 1.21.6 blockstate for 1.21.7 blockstate -1

[kennytv]

Fabric API, even without other mods, will change protocol to be Vanilla-incompatible if it detects the client mod https://github.com/FabricMC/fabric/blob/de8b3290191d806c7dacc1970e763d863a3888c9/fabric-particles-v1/src/main/java/net/fabricmc/fabric/impl/particle/ExtendedBlockStateParticleEffectPacketCodec.java#L24

[szimione]

so will there be a fix or a workaround?

[kennytv]

Fabric is working on moving their custom data there to custom payloads instead of modifying Vanilla packet data structure

[TreeOfSelf]

+1
Missing 1.21.6 blockstate for 1.21.7 blockstate -1