Could not start R session, timed out - with renv and language server

[bk1n]

Trying to get language server to work in latest build of VS Code, R 4.6.0,

Project dependencies are managed with renv. I have verified I have renv installed in both local and project library.

When launching VS Code, I get the following stack trace from the OUTPUT tab for R Language Server:

R Language Server (5068) started
R library paths: F:/Programs/R/R-4.6.0/library

[2026-05-25 23:14:23.818] Error: ! Could not start R session, timed out
Call: [1] "rs_init(self, private, super, options, wait, wait_timeout)"
Stack trace:
1: throw(new_error("Could not start R session, timed out"))
2: rs_init(self, private, super, options, wait, wait_timeout)
3: initialize(...)
4: callr::r_session$new(options = callr::r_session_options(system_profile = TRUE, 
    user_profile = TRUE), wait = TRUE)
5: private$find_or_create_session()
6: self$diagnostics_task_manager$run_tasks()
7: self$process_events()

[2026-05-25 23:14:23.820] exiting

[Error - 11:14:23 PM] Client R Language Server: connection to server is erroring.
read ECONNRESET
[Error - 11:14:23 PM] Client R Language Server: connection to server is erroring.
read ECONNRESET
[Error - 11:14:23 PM] Connection to server got closed. Server will not be restarted.
R Language Server (5068) exited with exit code null

Any ideas? I believe it's due to the renv environment being activated because when I comment out the source file added to my .Rprofile project file, it works fine. But when renv activation script is sourced in .Rprofile (source("renv/activate.R"), it throws this error. I could not find any way to adjust timeout settings. I timed a launch of my CLI (Git Bash), it takes approximately 5 seconds with the activation script. Without the activation sourced, it's essentially instant.

So is it an issue with how long it's taking renv to scan files in my environment? I have added all non .R scripts to my .renvignore to speed the process up.

[bk1n]

I think I have diagnosed the issue further, it's simply how long the synchronized check is taking. Setting renv.config.synchronized.check = FALSE clears this issue. Is there any way to improve this or is it simply a case of turning this off for larger projects? Is there any way to change the timeout tolerance for callr in settings?