Does this issue occur when all extensions are disabled?: N/A

• VS Code Version:
• OS Version: Version: 1.93.0-insider (user setup)
  Commit: 4693ac3
  Date: 2024-08-09T06:29:39.564Z
  Electron: 30.1.2
  ElectronBuildId: 9870757
  Chromium: 124.0.6367.243
  Node.js: 20.14.0
  V8: 12.4.254.20-electron.0
  OS: Windows_NT x64 10.0.26100

Steps to Reproduce:

1. Create a .py and notebook and lay out tabs as shown

def f(x):
    print(x)
    print(x)  # breakpoint here

# notebook cell
import foo

foo.f(3)
foo.f(4)

2. When the breakpoint is hit, use F11 Step Into.

Expected result:

Actual result: duplicate Notebook editor opens

I have a fix for this