It's happened when I try to update MATLAB R2018b into update 5 using this command
C:\Program Files\MATLAB\R2018b\bin\win64>update_installer.exe -updatepack "X:\x\R2018b"
After that, there are two connection error on the dispatch log, but haven't crashed yet.
C:\WINDOWS\system32>dispatch start --debug
SOCKS server started on localhost:1080
Dispatching to addresses 192.168.42.24@1, 192.168.0.177@1
request [2bd346] 127.0.0.1:32415
dispatch [2bd346] 192.168.42.24
error [2bd346] serverConnection
Error: connect EADDRNOTAVAIL 127.0.0.1:32415
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1106:14)
end [2bd346] clientConnection
request [873201] 127.0.0.1:32415
dispatch [873201] 192.168.42.24
error [873201] serverConnection
Error: connect EADDRNOTAVAIL 127.0.0.1:32415
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1106:14)
end [873201] clientConnection
The MATLAB window that was supposed to show the update installer throwing an error

Failed to load URL http://localhost:32415/ui/install/update_installer/update_installer/index.html?matlabroot=C:\Program%20Files\MATLAB\R2018b&helper_launch_path=C:\Users\x\AppData\Local\Temp\mw_F112.tmp&updatepack=X:\x\R2018b with error ERR_SOCKS_CONNECTION_FAILED (-120).
After I closed the window, the dispatch process crashed, here is the cmd log
events.js:174
throw er; // Unhandled 'error' event
^
Error: read ECONNRESET
at TCP.onStreamRead (internal/stream_base_commons.js:111:27)
Emitted 'error' event at:
at emitErrorNT (internal/streams/destroy.js:91:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
at process._tickCallback (internal/process/next_tick.js:63:19)
C:\WINDOWS\system32>
Here is the correct MATLAB update window.

Here is my system proxy settings

While it is not a crucial bug because I could still successfully update without any problem by turning off my proxy, but still, I would like to report it here.
It's happened when I try to update MATLAB R2018b into update 5 using this command
After that, there are two connection error on the dispatch log, but haven't crashed yet.
The MATLAB window that was supposed to show the update installer throwing an error
Failed to load URL http://localhost:32415/ui/install/update_installer/update_installer/index.html?matlabroot=C:\Program%20Files\MATLAB\R2018b&helper_launch_path=C:\Users\x\AppData\Local\Temp\mw_F112.tmp&updatepack=X:\x\R2018b with error ERR_SOCKS_CONNECTION_FAILED (-120).After I closed the window, the dispatch process crashed, here is the cmd log
Here is the correct MATLAB update window.

Here is my system proxy settings

While it is not a crucial bug because I could still successfully update without any problem by turning off my proxy, but still, I would like to report it here.