If an RStudio project are open, a non-project RStudio R session will use the other project's .Rprofile

[CorradoLanera]

System details

RStudio Edition : Desktop
RStudio Version : RStudio Desktop Pro 2024.04.0 Build 735.pro3 "Chocolate Cosmos" Release (c994988f, 2024-04-24)
OS Version      :  Windows 11 Edu
R Version       :  4.4.0

Steps to reproduce the problem

1. create a ~/.Rprofile
2. create a RStudio project "A" with its local .Rprofile
3. Open project A (it will use its .Rprofile)
4. with project A still opened, open a new RStudio session out of any project. The bug is that it will use the .Rprofile of project A and not the user ~/.Rprofile.

Describe the problem in detail

I have set up RStudio to not enter any project automatically at startup.
So, I have also created an out-of-project ~/.Rprofile to work outside of any projects.

So, if I open RStudio, the ~/.Rprofile file will be loaded, as expected.
Next, if I open an RStudio project on a different session/window, the new project will open correctly, loading its own path/to/proj/.Rprofile file at startup. Now I have two instances of RStudio: out-of-project and proj.

The issue is that if I restart the R session on the out-of-project RStudio instance at that moment, it loads the path/to/proj/.Rprofile file instead of the ~/.Rprofile one.

Attached:

• A screen video of the procedure generating the issue
• The diagnostic report was produced after the procedure was recorded.

Contacted Posit support (Ticket #104756), they asked me to open an issue, and to refer this to #13922

Describe the behavior you expected

The out-of-any-project session should always use ~/.Rprofile

• I have read the guide for submitting good bug reports.
• I have installed the latest version of RStudio, and confirmed that the issue still persists.
• If I am reporting an RStudio crash, I have included a diagnostics report.
• I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.