Error parsing path on a virtual filesystem

[A6GibKm]

when trying to save on a virtual filesystem on a Flatpak environment
I get an error of type construct.core.StreamError with message Error in path (building) -> header. The path of such file is of the form

/run/user/1000/gvfs/google-drive:host=domain.com,user=xxxxxx/aosifj--IDAKSK/ASNsakdsuMOS_asoiamaoSKFN

[Evidlo]

You can test if this is an error in Construct

from construct import Struct, Bytes
s = Struct("field1" / Bytes(16))
parsed = s.parse(b'\x00' * 16)

s.build_file(parsed, '/path/to/file')
parsed = s.parse_file('/path/to/file')

[A6GibKm]

I run that with a path /run/user/1000/doc/4a590d6a/1Ok2JCH6OhZBMia1tSPo6CDnPuMXONhrG

>>> s.build_file(parsed, path)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/app/lib/python3.9/site-packages/construct/core.py", line 355, in build_file
    self.build_stream(obj, f, **contextkw)
OSError: [Errno 29] Illegal seek

As a side effect the database gets deleted (weights 0 bytes). I am not sure if thats what the snippet does, or not. Anyways, this might be also a weird Flatpak issue.