[EFAULT] Failed to set NT password for knen: Username not found!

Hello guys,

I experience probably the same bug that was described in NAS-109045.

At first I have created group named - oa (with "Samba Authentication" checked). And after that I was creating users one by one and adding them to the auxiliary group. Unfortunately time to time I got same error described in the issue. So I updated TrueNAS from 12.0-U-1.1 to 12.0-U2, but it did not help and I still often get the following error:

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 1195, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/local/lib/python3.8/site-packages/middlewared/service.py", line 455, in create
    rv = await self.middleware._call(
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1195, 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 316, in do_create
    await self.__set_smbpasswd(data['username'])
  File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/account.py", line 857, in __set_smbpasswd
    await self.middleware.call('smb.update_passdb_user', username)
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1238, in call
    return await self._call(
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1195, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/smb_/passdb.py", line 112, 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 knen: Username not found!

Could you help me with that please?