Server did not properly shut down TLS connection (General questions)

Hi there-

I'm getting this error with version 3.2.0.360. I just updated to that version to try to get rid of the issue in case it was due to an out-of-date SFTPServer component version.

I saw this forum post with the same error which may be relevant, with ProFTPD:
https://forums.proftpd.org/smf/index.php?topic=3501.0

Please let me know the situation and what to do to eliminate this error, thanks!

Here's the full transcript from FileZilla client, for reference:
Status: Resolving address of XXXXXX.com
Status: Connecting to XX.XX.XX.XX:21...
Status: Connection established, waiting for welcome message...
Response: 220 XXXXXXXXXXX
Command: AUTH TLS
Response: 234 Go on, try to authenticate!
Status: Initializing TLS...
Status: Verifying certificate...
Command: USER XXXXX
Status: TLS/SSL connection established.
Response: 331 Password required for cyman
Command: PASS *******
Response: 230 User XXXXX logged in
Command: CLNT FileZilla
Response: 200 Ok, welcome
Command: OPTS UTF8 ON
Response: 200 OPTS UTF8 is set to ON.
Command: PBSZ 0
Response: 200 PBSZ 0 successful
Command: PROT P
Response: 200 Data connection set to: Private
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 / is current directory
Command: TYPE I
Response: 200 TYPE set to BINARY
Command: PASV
Response: 227 Entering passive mode (38,64,132,234,11,153)
Command: MLSD
Response: 150 Opening ASCII mode data connection
Response: 226 Directory send OK
Error: GnuTLS error -9: A TLS packet with unexpected length was received.
Status: Server did not properly shut down TLS connection
Error: Could not read from transfer socket: ECONNABORTED - Connection aborted
Error: Failed to retrieve directory listing
Error: Connection closed by server

Hi,

I just tried connecting to our FTPS server VB6 sample with FileZilla client, and it worked like a charm. Is there any chance we could reproduce this on our side?

Regards,
Damba