Unit test:
public class ZipCloneTest {
    public static void main(String[] args) throws IOException {
        Map<String, Object> env = new HashMap<>();
env.put("encoding", "utf-8");
        env.put("create", "true");

        // create a source zip file abc.jar
        Path file = Paths.get("abc.jar");
        java.nio.file.Files.deleteIfExists(file);
        URI uri = URI.create("jar:" + file.toUri().toString());
        ZipFileSystem fs = (ZipFileSystem) FileSystems.newFileSystem(uri, env, null);
        Path p = fs.getPath("/");
        java.nio.file.Files.createFile(p.resolve("1.txt"));
        fs.close();
        
        Map<String, Object> env2 = new HashMap<>();
        env2.put("encoding", "utf-8");
        ZipFileSystem fs2 = (ZipFileSystem) FileSystems.newFileSystem(uri, env2, null);
        Path p2 = fs2.getPath("/1.txt");
        
        // copy files of abc.jar into def.jar
        Path file3 = Paths.get("def.jar");
        java.nio.file.Files.deleteIfExists(file3);
        URI uri3 = URI.create("jar:" + file3.toUri().toString());
        ZipFileSystem fs3 = (ZipFileSystem)FileSystems.newFileSystem(uri3, env, null);
        Path p3 = fs3.getPath("/").resolve("3.txt");
        java.nio.file.Files.copy(p2, p3);
        fs3.close();
        fs2.close();
    }
}

Expected:
test passed without exception

Actual:
Exception in thread "main" java.io.EOFException: Unexpected end of ZLIB input stream
at com.sun.nio.zipfs.ZipFileSystem$5.fill(ZipFileSystem.java:1427)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
at java.io.FilterInputStream.read(FilterInputStream.java:107)
at com.sun.nio.zipfs.ZipPath.copyToTarget(ZipPath.java:858)
at com.sun.nio.zipfs.ZipPath.copy(ZipPath.java:817)
at com.sun.nio.zipfs.ZipFileSystemProvider.copy(ZipFileSystemProvider.java:194)
at java.nio.file.Files.copy(Files.java:1234)
at ZipCloneTest.main(ZipCloneTest.java:34)
Java Result: 1