Visual Studio Code - Debug Only Works Once w/ Conda Virtual Environment

Visual Studio Code Version: 1.40.1 for macOS
I'm writing python code, and I am using an anaconda virtual environment.

When I hit F5 to run in debug, it will work as expected but only once after the VS Code app has been opened. Thereafter, terminal message "bash: env: command not found". Restarting the VS Code app corrects the problem, but only for the 1st attempt to debug. For reference, here is what launch.json looks like:

{
    "version": "0.2.0",
    "configurations": [

        {
            "name": "Python: Current File",
            "type": "python",
            "request": "launch",
            "program": "${file}",
            "console": "integratedTerminal"
        }
    ]
}

I am noticing for the automation associated with hitting F5, the first successful run issues terminal commands different than those issued for the subsequent unsuccessful attempts: 1st (successful):

bash-3.2$ source /anaconda3/bin/activatesource /anaconda3/bin/activate
/anaconda3/envs/mvtrade/bin/python /Users/<user.name>/.vscode/extensions/ms-python.python-2019.11.49689/pythonFiles/ptvsd_launcher.py --default --client --host localhost --port 53321 /Users/<user.name>/repos/mvtrade/scratch.py 
conda activate mvtrade
(base) bash-3.2$ /anaconda3/envs/mvtrade/bin/python /Users/<user.name>/.vscode/extensions/ms-python.python-2019.11.49689/pythonFiles/ptvsd_launcher.py --default --client --host localhost --port 53321 /Users/<user.name>/repos/mvtrade/scratch.py

all subsequent (unsuccessful)

(base) bash-3.2$ conda activate mvtrade
(mvtrade) bash-3.2$ cd /Users/<user.name>/repos/mvtrade ; env PYTHONIOENCODING=UTF-8 PYTHONUNBUFFERED=1 /anaconda3/envs/mvtrade/bin/python /Users/<user.name>/.vscode/extensions/ms-python.python-2019.11.49689/pythonFiles/ptvsd_launcher.py --default --client --host localhost --port 53349 /Users/<user.name>/repos/mvtrade/scratch.py 
bash: env: command not found

I have read this, which doesn't appear to have ever been resolved.

Why is the 1st attempt succeeding while the rest do not? Why are the bash commands different?