FluentFTP: Uploading error when connecting through SOCKS4 / SOCKS4a / SOCKS5 proxy

FTP OS: Windows

FTP Server: Reproduced on XLight and EFT

Computer OS: Windows

FluentFTP Version: 38.0.0

Every time I upload 8 megs or (bigger) file through SOCKS4, SOCKS4a or even SOCKS5 (which exists in the library for the long time) it is uploaded incomplete and with different file size each time. When I upload without proxy, everything is OK.

Logs :

# Connect()
Status:   Connecting to ***:1080
Response: 220 Xlight FTP Server 3.8 ready...
Status:   Detected FTP server: XLight
Command:  USER ***
Response: 331 Password required for nuser
Command:  PASS ***
Response: 230 Login OK
Command:  FEAT
Response: 211-Features supported
Response: REST STREAM
Response: EPRT
Response: EPSV
Response: SIZE
Response: MDTM
Response: MFMT
Response: AUTH
Response: PBSZ
Response: PROT
Response: MLST type*;size*;modify*;
Response: MLSD
Response: 211 End
Status:   Text encoding: System.Text.ASCIIEncoding
Command:  SYST
Response: 215 UNIX Type: L8
Status:   Listing parser set to: Machine

# Upload("test.mdf", Overwrite, False)

# FileExists("test.mdf")
Command:  PWD
Response: 257 "/"
Command:  SIZE /test.mdf
Response: 213 7954432

# DeleteFile("test.mdf")
Command:  DELE test.mdf
Response: 250 Deleted file "test.mdf".

# OpenWrite("test.mdf", Binary)

# GetFileSize("test.mdf")
Command:  SIZE test.mdf
Response: 550 Can't find file "test.mdf".
Command:  TYPE I
Response: 200 Type set to I.

# OpenPassiveDataStream(AutoPassive, "STOR test.mdf", 0)
Command:  EPSV
Response: 229 Entering Passive Mode (|||50030|)
Status:   Connecting to ***:1080
Command:  STOR test.mdf
Response: 150 Opening BINARY mode data connection for test.mdf.
Status:   Disposing FtpSocketStream...
Response: 226 Transfer complete (26707.252 KB/s).
Command:  QUIT
Response: 221 Good-Bye
Status:   Disposing FtpSocketStream...