VSCode Debugger always uses wrong Python interpreter despite selecting correct one when debug current python file.

[cuiluyi]

Description

As shown in the attached screenshot, my active terminal is using the base environment (highlighted in the bottom-left corner).
I selected base as the project interpreter via Ctrl + Shift + P → Python: Select Interpreter (highlighted in the bottom-right corner).

However, when I use the debugpy extension to debug the current Python file, the debugger always launches using the openr1 environment instead (note: this is the first Conda environment name that appears in the Python: Select Interpreter command palette), therefore cause import error: no module found.

Even after executing the following commands, the issue persists:

• Python: Clear Workspace Interpreter Settings
• Python Debugger: Clear Cache and Reload Window
• Python: Clear Cache and Reload Window

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Root Cause

After extensive troubleshooting, I discovered that the issue is caused by the Python Environment Manager VSCode extension.
Once I uninstalled that extension, everything worked correctly — the debugger began using the selected interpreter as expected.

Note

The VSCode extension Python Environment Manager (deprecated) doesn't have this problem.

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Expected Behavior

The debugger should respect the interpreter selected via Python: Select Interpreter.

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Actual Behavior

The debugger ignores the selected interpreter and always uses the first Conda environment (openr1).

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Environment

• VSCode version:

  Version: 1.105.1 (Universal)
  Commit: 7d842fb85a0275a4a8e4d7e040d2625abbf7f084
  Date: 2025-10-14T22:33:36.618Z (2 wks ago)
  Electron: 37.6.0
  ElectronBuildId: 12502201
  Chromium: 138.0.7204.251
  Node.js: 22.19.0
  V8: 13.8.258.32-electron.0
  OS: Darwin arm64 25.0.0

• Python Environment Manager version: 1.10.0

• Python Debugger version: 2025.14.1

• Remote - SSH version: 0.120.0

• OS version: MacOS 26.0.1 (25A362)

[eleanorjboyd]

Hi! I have just made changes here which are out on the latest version of the debugger extension pre-release. Are you able to try this on the pre-release version and see if that helps? If not can you add this setting python.useEnvironmentsExtension and try again? This will also change the behavior to use our new extension for handling and selecting python environments