Python Meterpreter - scanner/discovery/udp_probe doesn't work with pivot

[AlanFoster]

Running udp_probe on host:

msf6 auxiliary(scanner/discovery/udp_probe) > run rhosts=172.16.83.1/24

[+] Discovered DNS on 172.16.83.1:53 (....etc....)
[+] Discovered NetBIOS on 172.16.83.3:137 (....etc...)
[*] Scanned  26 of 256 hosts (10% complete)
... etc ...

Opening Python Meterpreter:

use payload/python/meterpreter_reverse_tcp
generate -o shell.py -f raw lhost=127.0.0.1 PythonMeterpreterDebug=true MeterpreterTryToFork=false
to_handler

Run the payload in a separate tab:

python3 shell.py

Add a route for the newly opened session:

route add 172.16.83.1 255.255.255.0 -1

Single rhost doesn't work:

msf6 auxiliary(scanner/discovery/udp_probe) > run rhosts=172.16.83.1

[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

Multiple rhosts crashes the meterpreter session:

msf6 auxiliary(scanner/discovery/udp_probe) > run rhosts=172.16.83.1/24
[*] 127.0.0.1 - Meterpreter session 5 closed.  Reason: Died

Python log:

[*] running method core_channel_open
[*] core_channel_open dispatching to handler: channel_open_stdapi_net_udp_client
[*] added channel id: 14 type: MeterpreterSocketUDPClient
[*] sending response packet
[*] running method core_channel_write
[-] method core_channel_write resulted in error: #1
[*] sending response packet
Traceback (most recent call last):
  File "/Users/user/metasploit-framework/shell.py", line 1728, in <module>
    met.run()
  File "/Users/user/metasploit-framework/shell.py", line 1365, in run
    if select.select([channel.fileno()], [], [], 0)[0]:
ValueError: file descriptor cannot be a negative integer (-1)