Default folder to save new file changes randomly

[freebrowser1]

Description

When saving a new file, i.e. not an already open file save under another name, but saving the contents of a fresh buffer to a file, stores it in a semi-random directory.

Steps to Reproduce

1. Create a new text window (cmd+n)
2. Type some text
3. Click File => Save As...

Expected behavior:
The last folder of the current project should be the one of the folders listed in projects.cson:

[

{
title: "name"
paths: [
"/Users/name/Downloads"
"/Users/name/Documents"
]
}
]

Actual behavior:
The folder listed is a folder one ever added in another project which folder is even not listed in projects.cson.
And I cannot get rid of this default folder, cannot change it by any means, so I have to change that folder every time when I save a fresh buffer.
Note: existing files are stored in the correct folder, so it applies to fresh buffers only.

Reproduces how often:
Any time.

Versions

% atom --version
Atom : 1.54.0
Electron: 6.1.12
Chrome : 76.0.3809.146
Node : 12.4.0
% apm --version
apm 2.5.2
npm 6.14.8
node 12.4.0 x64
atom 1.54.0
python 2.7.17
git 2.24.3

Additional Information

macOS Big Sur 11.1 (Intel).