Debugging Unexpected termination of the channel

Using Jenkins Ask a question
1

Which side the connection throws this message that I see on the jenkins controller log page?

Nov 24, 2022 9:28:07 AM INFO hudson.remoting.SynchronousCommandTransport$ReaderThread runI/O error in channel slippery_host
java.io.EOFException
	at java.base/java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2894)
	at java.base/java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3389)
	at java.base/java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:931)
	at java.base/java.io.ObjectInputStream.<init>(ObjectInputStream.java:374)
	at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:49)
	at hudson.remoting.Command.readFrom(Command.java:142)
	at hudson.remoting.Command.readFrom(Command.java:128)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:35)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:61)
Caused: java.io.IOException: Unexpected termination of the channel
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:75)

I use SSH, and I disabled the ping thread. Disabling the ping thread helped a little, but I am still seeing the same error.
Using Jenkins LTS 2.361.2.