/viaversion dump Output

https://dump.viaversion.com/e97266abb81866ad38830e9119bf77829566f77852a01d4bf3ae3a85771900b5

Console Error

https://paste.gg/p/anonymous/00e93cd78dac4bffb6b75a578103429b

Bug Description

Unable to join 1.20.2 server on 1.20.1 client

Steps to Reproduce

1. Join 1.20.2 server using 1.20.1 client
2. Not connect because of error

Expected Behavior

The client should be able to successfully connect to the server

Additional Server Info

I'm not using a proxy

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.

Had this same issue with a large server, had to downgrade to 1.20.1. Can reproduce.

Confirmed bug.

Can you try the version on the dev branch?

I have tested the dev branch and it manages to persist here.

Same issue here

Update: This has turned out to be a fabric API problem, although i'm unsure when this will be resolved at all; 1.19.4 servers and older however aren't affected.

so i tried just doing that and it doesnt seem to help? i put the 88.5 networking into 90.7

I was thinking of trying to replace the networking jar in fabric api with a pre-3324 one and seeing if that works, might try later (iirc the api is referenced by the mods so changing it at the api file should affect the mods as well)

Update: This has turned out to be a fabric API problem, although i'm unsure when this will be resolved at all; 1.19.4 servers and older however aren't affected.

Are there any more updates on this? You're saying it's a Fabric API problem, but the Fabric API team is saying it's an (unreported) ViaBackwards problem, and at the moment it doesn't seem like anyone is taking ownership of it.

Update: This has turned out to be a fabric API problem, although i'm unsure when this will be resolved at all; 1.19.4 servers and older however aren't affected.

Are there any more updates on this? You're saying it's a Fabric API problem, but the Fabric API team is saying it's an (unreported) ViaBackwards problem, and at the moment it doesn't seem like anyone is taking ownership of it.

One of the methods we have thought of is attempting to inject into Fabric's API or/and block fabric's payloads in viaversion but this is ultimately the worst solution out of anything else, but we are open to ideas to how to resolve this for both sides.

Looks like I have the same issue, have you contacted fabricAPI team? Have they done anything about it?

Fixed in d30766a.