importlib.resources.files.joinpath : Linter Error : "Traversable" is incompatible with Path

[ucomru]

I hava a project "po" with some data files:

|-- setup.py
|-- po
     |-- ...
     |-- data
          |-- file ...

Some times ago I used data files with non PEP methods to get package data file Path:

def data_file(file: str) -> Path:
    ''' Path to .data/file '''
    return Path(__file__).parent.joinpath('data', file)

This time I try to use canonic PEP method:

from importlib.resources import files

def data_file(file: str) -> Path:
    ''' Path to .data/file '''
    return files('po.data').joinpath(file)

Its also work correctly, but importlib.resources.files.joinpath return an abstract class Traversable:

def joinpath(self, *descendants: StrPath) -> "Traversable":

Im gettin Linter Error : "Traversable" is incompatible with Path

But, all two methods return the equal type files('po.data').joinpath(file):

Path(__file__).parent.joinpath('data', file)  ==>  <class 'pathlib.PosixPath'>
files('po.data').joinpath(file)  ==>  <class 'pathlib.PosixPath'>

I broke the head, but I do not know as correctly to bypass a mistake or to make.
Help, please!
Many Thanks!