Venv is not activated on already opened terminal on start up when `python.terminal.activateEnvInCurrentTerminal` is `true`

Issue Type: Bug

Below is my settings.json:

{
    "terminal.integrated.shellArgs.windows": [
        "-NoLogo"
    ],
    "workbench.startupEditor": "none",
    "editor.formatOnSave": true,
    "editor.formatOnPaste": true,
    "editor.formatOnType": true,
    "code-runner.runInTerminal": true,
    "code-runner.saveFileBeforeRun": true,
    "workbench.panel.defaultLocation": "right",
    "terminal.integrated.copyOnSelection": true,
    "python.languageServer": "Pylance",
    "python.pythonPath": "C:/Users/AmericaN/Desktop/Lab/MyEnv/Scripts/python.exe",
    "code-runner.executorMap": {
        "python": "$pythonPath -u $fullFileName"
    },
    "code-runner.ignoreSelection": true,
    "remote.SSH.remotePlatform": {
        "My": "linux"
    },
    "terminal.integrated.shell.windows": "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
    "python.autoComplete.addBrackets": true,
    "python.terminal.activateEnvInCurrentTerminal": true,
    "files.exclude": {
        "**/.vscode": true,
        "**/MyEnv": true
    },
    "code-runner.showExecutionMessage": false,
    "python.analysis.completeFunctionParens": true,
    "workbench.editorAssociations": [
        {
            "viewType": "jupyter.notebook.ipynb",
            "filenamePattern": "*.ipynb"
        }
    ],
    "python.showStartPage": false
}

1. open any .py file and leave the intergrated termianl open.
2. close and reopen vscode.
3. you will find that the enviroment is not activated.

But if i closed the terminal and reopened it again, so the enviroment will be activated.

And here’s the log from Python log:

User belongs to experiment group 'pythonaa'
User belongs to experiment group 'pythonSendEntireLineToREPL'
User belongs to experiment group 'pythonNotDisplayLinterPrompt'
User belongs to experiment group 'pythonDiscoveryModulecf'
User belongs to experiment group 'pythonTensorboardExperimentcf'
User belongs to experiment group 'PythonPyTorchProfiler'
User belongs to experiment group 'ShowExtensionSurveyPrompt - enabled'
User belongs to experiment group 'CollectLSRequestTiming - control'
> conda --version
> pyenv root
> python3.7 c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> python3.6 c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> python3 c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> python2 c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> python c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> py -3.7 c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> py -3.6 c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> py -3 c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> py -2 c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> c:\Users\AmericaN\Desktop\Lab\MyEnv\Scripts\python.exe c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> conda info --json
Python interpreter path: .\MyEnv\Scripts\python.exe
Starting Pylance language server.
Error 2021-03-28 05:27:16: Detection of Python Interpreter for Command py and args -3.6 failed as file Python 3.6 not found!

 -3.9-64 does not exist
Error 2021-03-28 05:27:16: Detection of Python Interpreter for Command py and args -3.7 failed as file Python 3.7 not found!

 -3.9-64 does not exist
Error 2021-03-28 05:27:16: Detection of Python Interpreter for Command python3 and args  failed as file  does not exist
Error 2021-03-28 05:27:16: Detection of Python Interpreter for Command py and args -2 failed as file Python 2 not found!

 -3.9-64 does not exist
Error 2021-03-28 05:27:16: Failed to get interpreter information for 'C:\Users\AmericaN\AppData\Local\Microsoft\WindowsApps\python.exe' [Error: Command failed: "C:\\Users\AmericaN\AppData\Local\Microsoft\WindowsApps\python.exe" "c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py" "c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\interpreterInfo.py"
Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings > Manage App Execution Aliases.

	at ChildProcess.exithandler (child_process.js:312:12)
	at ChildProcess.emit (events.js:315:20)
	at maybeClose (internal/child_process.js:1021:16)
	at Socket.<anonymous> (internal/child_process.js:443:11)
	at Socket.emit (events.js:315:20)
	at Pipe.<anonymous> (net.js:674:12)] {
  killed: false,
  code: 9009,
  signal: null,
  cmd: '"C:\\\\Users\\AmericaN\\AppData\\Local\\Microsoft\\WindowsApps\\python.exe" "c:\\Users\\AmericaN\\.vscode\\extensions\\ms-python.python-2021.3.680753044\\pythonFiles\\pyvsc-run-isolated.py" "c:\\Users\\AmericaN\\.vscode\\extensions\\ms-python.python-2021.3.680753044\\pythonFiles\\interpreterInfo.py"'
}
Error 2021-03-28 05:27:16: Failed to get interpreter information for 'C:\Users\AmericaN\AppData\Local\Microsoft\WindowsApps\python3.exe' [Error: Command failed: "C:\\Users\AmericaN\AppData\Local\Microsoft\WindowsApps\python3.exe" "c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\pyvsc-run-isolated.py" "c:\Users\AmericaN\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\interpreterInfo.py"
Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings > Manage App Execution Aliases.

	at ChildProcess.exithandler (child_process.js:312:12)
	at ChildProcess.emit (events.js:315:20)
	at maybeClose (internal/child_process.js:1021:16)
	at Socket.<anonymous> (internal/child_process.js:443:11)
	at Socket.emit (events.js:315:20)
	at Pipe.<anonymous> (net.js:674:12)] {
  killed: false,
  code: 9009,
  signal: null,
  cmd: '"C:\\\\Users\\AmericaN\\AppData\\Local\\Microsoft\\WindowsApps\\python3.exe" "c:\\Users\\AmericaN\\.vscode\\extensions\\ms-python.python-2021.3.680753044\\pythonFiles\\pyvsc-run-isolated.py" "c:\\Users\\AmericaN\\.vscode\\extensions\\ms-python.python-2021.3.680753044\\pythonFiles\\interpreterInfo.py"'
}
> conda --version

Extension version: 2021.3.680753044 VS Code version: Code 1.54.3 (2b9aebd5354a3629c3aba0a5f5df49f43d6689f8, 2021-03-15T10:55:45.459Z) OS version: Windows_NT x64 10.0.19042

vsliv368cf:30146710
vsreu685:30147344
python383cf:30185419
pythonvspyt700cf:30270857
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstry244:30276681
pythonvsdeb440:30248342
pythonvsded773:30248341
pythonvspyt875:30259475
pythonvsnew554cf:30280384
pythontbcf:30265426
vspre833:30267464
pythonptprofiler:30281270
vshan820cf:30276953