This is spammed when I try to start the game with 5zig, and the game freezes (seems to be a conflict between 5zig and a very simple mod I have)

[20:52:39] [5zig Netty Client/INFO] [5zig/]: Connected after 0 tries!
[20:52:39] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketClientStats@7a06d0eb (2 bytes)
[20:52:39] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketClientStats@7ae8d943 (54 bytes)
[20:52:39] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketSettings@52687456 (3 bytes)
[20:52:39] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketProfile@28abd03 (64 bytes)
[20:52:39] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketFriendRequestList@3b923c49 (5 bytes)
[20:52:39] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketFriendList@220afa6 (5 bytes)
[20:52:43] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@2c915af1 (5 bytes)
[20:52:43] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@2ee7f53a (5 bytes)
[20:52:48] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@293d32df (5 bytes)
[20:52:48] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@fddb3db (5 bytes)
[20:52:53] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@48a6b96d (5 bytes)
[20:52:53] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@59f9cb66 (5 bytes)
[20:52:58] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@1912b14c (5 bytes)
[20:52:58] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@7bb38ade (5 bytes)
[20:53:03] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@6233914 (5 bytes)
[20:53:03] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@1196704d (5 bytes)
[20:53:08] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@1d022be2 (5 bytes)
[20:53:08] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@7a00a7e6 (5 bytes)
[20:53:13] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@6574da2b (5 bytes)
[20:53:13] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@4742cad0 (5 bytes)
[20:53:18] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@4b93b4e1 (5 bytes)
[20:53:18] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@34d315e2 (5 bytes)
[20:53:23] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@773534d1 (5 bytes)
[20:53:23] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@26f064ad (5 bytes)
[20:53:28] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@7012f82e (5 bytes)
[20:53:28] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@5cc28fcb (5 bytes)
[20:53:33] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@28fbb3e (5 bytes)
[20:53:33] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@277f62ce (5 bytes)
[20:53:38] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@404b3d87 (5 bytes)
[20:53:38] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@83f4e92 (5 bytes)
[20:53:43] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@771652e0 (5 bytes)
[20:53:43] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@2ba327de (5 bytes)
[20:53:48] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@329d9028 (5 bytes)
[20:53:48] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@40240337 (5 bytes)
[20:53:53] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@560c881 (5 bytes)
[20:53:53] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@374f8224 (5 bytes)
[20:53:58] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@698d5835 (5 bytes)
[20:53:58] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@950d388 (5 bytes)
[20:54:03] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@a7726e3 (5 bytes)
[20:54:03] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@41e2cb2b (5 bytes)
[20:54:08] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@42ad7fd2 (5 bytes)
[20:54:08] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@4d6e289c (5 bytes)
[20:54:13] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@7e1d5fec (5 bytes)
[20:54:13] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@29f17897 (5 bytes)
[20:54:18] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@8bc194 (5 bytes)
[20:54:18] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@3c9d23d1 (5 bytes)
[20:54:23] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@28ebf991 (5 bytes)
[20:54:23] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@a7c19db (5 bytes)
[20:54:28] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@54a5fe61 (5 bytes)
[20:54:28] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@1f3dc8f (5 bytes)
[20:54:33] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@76239a51 (5 bytes)
[20:54:33] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@1c7be78f (5 bytes)
[20:54:38] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@67565497 (5 bytes)
[20:54:38] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@785efb56 (5 bytes)
[20:54:43] [5zig Netty Client/DEBUG] [5zig/]: IN | eu.the5zig.mod.chat.network.packets.PacketHeartbeat@12c5071e (5 bytes)
[20:54:43] [5zig Netty Client/DEBUG] [5zig/]: OUT| eu.the5zig.mod.chat.network.packets.PacketHeartbeat@51c1cd56 (5 bytes)

The mod that 5zig is conflicting with (removing either of them allows the game to start as normal) is one that simply adds a confirmation to the disconnect button. It should not be causing this.

The issue shows a log spam of network packet heartbeats from the 5zig mod, causing a freeze when another mod is present. Start by examining the network packet handling code in eu.the5zig.mod.chat.network.packets, particularly PacketHeartbeat. Look for any thread blocking or infinite loops triggered by the presence of the disconnect confirmation mod. Reproduce the conflict in a test environment with both mods to isolate the freeze point.

Written by the indexing model from the issue text.