Failed to set NT password for scan: Username not found! issue with special characters

Whan creating a new user with symbols in the password we get the below error:

have performed this test 3+ times and can verify the behavour is consistent.

Error: Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 137, in call_method
    result = await self.middleware._call(message['method'], serviceobj, methodobj, params, app=self,
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1191, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/local/lib/python3.8/site-packages/middlewared/service.py", line 463, in update
    rv = await self.middleware._call(
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1191, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/local/lib/python3.8/site-packages/middlewared/schema.py", line 973, in nf
    return await f(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/account.py", line 497, in do_update
    await self.__set_smbpasswd(user['username'])
  File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/account.py", line 800, in __set_smbpasswd
    await self.middleware.call('smb.update_passdb_user', username)
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1233, in call
    return await self._call(
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1191, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/smb_/passdb.py", line 111, in update_passdb_user
    raise CallError(f'Failed to set NT password for {username}: {setntpass.stderr.decode()}')
middlewared.service_exception.CallError: [EFAULT] Failed to set NT password for scan: Username not found!

Performing the same task only using alpha numeric characters works as expected.

Potentially a regex issue here but ill let the experts work this out.

let me know if any other information is required.

""Cheers

G