Server resource packet hash doesn't get received and sent by the client?

[DemonDxv]

Describe the bug
When the server sends out a WrapperPlayServerResourcePackSend on 1.8.9 the client doesn't send the hash that the server sent with it. The length of the string is always 0.

Software brand
Spigot 1.8.8-R0.1-SNAPSHOT (/about)

Plugins
ViaVersion, Spark, WorldGuard, Citizens, Strikepractice, PacketEvents, Essentials

How To Reproduce
Steps to reproduce the behavior:

1. Send a resource packet out like this every so often or on a command.

PacketEvents.getAPI().getPlayerManager().sendPacket(player, new
WrapperPlayServerResourcePackSend(
"level://" + "test" + "/resources.zip",
"test", false,
null));

2. Listen for the resource packet for the client, grab and debug the hash string from the packet it returns a 0 length string (PacketType.Play.Client.RESOURCE_PACK_STATUS)

Expected behavior
The client should give the hash that's provided when the server sends out the packet.

Screenshots
https://i.imgur.com/JAvTB6F.png
https://i.imgur.com/FzsHVaF.png

[retrooper]

On versions older than 1.10 (which happens to be your case), packetevents does recognize and write/read the hash within the packets. It could be that ViaVersion is modifying the packet and emptying the hash, causing you to experience this.

FYI: Versions 1.10+ have removed this hash.

Take away: Try without ViaVersion and see if it persists, inform us and maybe consider consulting with them.

[DemonDxv]

On versions older than 1.10 (which happens to be your case), packetevents does recognize and write/read the hash within the packets. It could be that ViaVersion is modifying the packet and emptying the hash, causing you to experience this.

FYI: Versions 1.10+ have removed this hash.

Take away: Try without ViaVersion and see if it persists, inform us and maybe consider consulting with them.

• I was wrong, I think its something to do with PacketEvents and bungeecord/velocity. As I tested without any plugins, and it still has the issue, but as soon as I go on a non bungee coord/velocity server (connecting straight to the server) running packet events its fine.

Edit:

So when using Velocity to connect to a server, that uses PacketEvents (on the spigot) it has this hash issue. If its not Velocity it doesn't have the issue (I made report to them: PaperMC/Velocity#1327)