[MC-231361] Occasional exceptionCaught() event: java.nio.channels.ClosedChannelException: null when interacting with multiplayer servers

The bug

Occasionally, when interacting with multiplayer servers (probably on the server list, but I'm not completely sure), the following error is logged in the game log.

[Netty Client IO #1/WARN]: An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
java.nio.channels.ClosedChannelException: null
	at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
[Netty Client IO #2/WARN]: An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
java.nio.channels.ClosedChannelException: null
	at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]

I'm unsure of the significance of this issue, but I have experienced the issue multiple times within the past few days and it didn't seem to have an impact on the game.