Hi Suraj,
I think it's been the behavior for a long time now that when you hit debug in a Reactive app, it opens a new "generic" instance of Chrome. However, when I keep the debugger open and do an action in my "normal" browser that was already open, the breakpoint is hit.
Also, if you are debugging in a module that is not the end-user module, you might need to keep the following in mind:
- Make sure you have refreshed and published the latest dependencies to the producer module you try to debug
- Start the debugging from the producer module and select the correct entry module

It is not possible to debug a producer module two levels deep (End User --> Producer 1 --> Producer2). If you want to do that, then you need to temporarily create a dependency between the End User module and Producer 2 module.
I hope this helps!