Crash regarding console input

The below crash occured out of nowhere multiple times - I wasn't even interacting with the console.

System: Debian 11, codename bullseye

If it helps: I used SSH to control the server, maybe that has something to do with it?

 
[23:50:42] [Server console handler/ERROR]: Exception handling console input
java.io.IOException: Input/output error
        at java.io.FileInputStream.readBytes(Native Method) ~[?:?]
        at java.io.FileInputStream.read(FileInputStream.java:271) ~[?:?]
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:282) ~[?:?]
        at java.io.BufferedInputStream.read(BufferedInputStream.java:343) ~[?:?]
        at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:297) ~[?:?]
        at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:339) ~[?:?]
        at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:188) ~[?:?]
        at java.io.InputStreamReader.read(InputStreamReader.java:178) ~[?:?]
        at java.io.BufferedReader.fill(BufferedReader.java:161) ~[?:?]
        at java.io.BufferedReader.readLine(BufferedReader.java:329) ~[?:?]
        at java.io.BufferedReader.readLine(BufferedReader.java:396) ~[?:?]
        at acd$1.run(SourceFile:101) [server-1.18%20Pre-release%201.jar:?]