Sourcemap not reloading after source code change

[Lavanya0402]

Command

add

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

Whenever I'm in debug mode, I make changes to the code, save it and try to add a breakpoint to the newly added line, the breakpoint is unbound. The sourcemap cannot detect the newly added line.

Minimal Reproduction

Run the application in debug mode.
Make code changes.
Save and wait for it to detect changes and reload.
Set breakpoint in newly added line.
Breakpoint is unbound or breakpoint is set at random location.

Exception or Error

Your Environment

Angular CLI: 19.1.8
Node: 22.14.0
Package Manager: npm 10.9.2
OS: win32 x64

Angular:
...

Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.1901.8 (cli-only)
@angular-devkit/core         19.1.8 (cli-only)
@angular-devkit/schematics   19.1.8 (cli-only)
@schematics/angular          19.1.8 (cli-only)

Anything else relevant?

No response

[alan-agius4]

I'm sorry, but we can't reproduce the problem following the instructions you provided.
Remember that we have a large number of issues to resolve, and have only a limited amount of time to reproduce your issue.
Short, explicit instructions make it much more likely we'll be able to reproduce the problem so we can fix it.

If the problem persists, please open a new issue following our submission guidelines.

A good way to make a minimal repro is to create a new app via ng new repro-app and add the minimum possible code to show the problem. Then you can push this repository to github and link it here.