While downloading multiple files, FTPException(Failure) is thrown

I am trying to read multiple RemoteFiles into InputStreams as described [here](https://github.com/hierynomus/sshj/issues/533#issuecomment-588125363).

The code works fine up to some point but suddenly fails by throwing FTPException as below.

```
...
2020-05-14 22:36:38,640 [debug] n.s.s.s.SFTPEngine - Sending Request{1049;OPEN}
2020-05-14 22:36:38,640 [debug] n.s.s.c.c.Window$Remote - Consuming by 51 down to 2044833
2020-05-14 22:36:38,652 [debug] n.s.s.c.c.Window$Local - Consuming by 17 down to 1619133
2020-05-14 22:36:38,652 [debug] n.s.s.s.PacketReader - Received HANDLE packet
2020-05-14 22:36:38,652 [debug] n.s.s.s.SFTPEngine - Sending Request{1050;OPEN}
2020-05-14 22:36:38,652 [debug] n.s.s.c.c.Window$Remote - Consuming by 51 down to 2044782
2020-05-14 22:36:38,663 [debug] n.s.s.c.c.Window$Local - Consuming by 17 down to 1619116
2020-05-14 22:36:38,663 [debug] n.s.s.s.PacketReader - Received HANDLE packet
2020-05-14 22:36:38,663 [debug] n.s.s.s.SFTPEngine - Sending Request{1051;OPEN}
2020-05-14 22:36:38,663 [debug] n.s.s.c.c.Window$Remote - Consuming by 51 down to 2044731
2020-05-14 22:36:38,674 [debug] n.s.s.c.c.Window$Local - Consuming by 17 down to 1619099
2020-05-14 22:36:38,674 [debug] n.s.s.s.PacketReader - Received HANDLE packet
2020-05-14 22:36:38,674 [debug] n.s.s.s.SFTPEngine - Sending Request{1052;OPEN}
2020-05-14 22:36:38,674 [debug] n.s.s.c.c.Window$Remote - Consuming by 51 down to 2044680
2020-05-14 22:36:38,685 [debug] n.s.s.c.c.Window$Local - Consuming by 17 down to 1619082
2020-05-14 22:36:38,685 [debug] n.s.s.s.PacketReader - Received HANDLE packet
2020-05-14 22:36:38,685 [debug] n.s.s.s.SFTPEngine - Sending Request{1053;OPEN}
2020-05-14 22:36:38,685 [debug] n.s.s.c.c.Window$Remote - Consuming by 51 down to 2044629
2020-05-14 22:36:38,696 [debug] n.s.s.c.c.Window$Local - Consuming by 28 down to 1619054
2020-05-14 22:36:38,696 [debug] n.s.s.s.PacketReader - Received STATUS packet
2020-05-14 22:36:38,697 [error] m.p.CustomJsonHttpErrorHandler - 7fn7ij306, Execution exception, [SFTPException: Failure], {}
net.schmizz.sshj.sftp.SFTPException: Failure
at net.schmizz.sshj.sftp.Response.error(Response.java:140)
at net.schmizz.sshj.sftp.Response.ensurePacketTypeIs(Response.java:117)
at net.schmizz.sshj.sftp.SFTPEngine.open(SFTPEngine.java:143)
at net.schmizz.sshj.sftp.SFTPEngine.open(SFTPEngine.java:149)
at net.schmizz.sshj.sftp.SFTPEngine.open(SFTPEngine.java:154)
```

In what case, does the client receive the Status packet and end up in failure?