Laravel: why sometimes file is uploaded without extension?

Question

Laravel

Greetings.
There was a problem uploading files.
Has anyone encountered the fact that when saving a file in this way

$path = $request->Filedata->store('path_to_folder');

Will the file be saved without extension?
Moreover, the problem does not always appear, sometimes the same file is loaded normally and sometimes without an extension.
The disk where the file is saved is located on another server and is connected via sftp.