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I believe 1.9.1 contains the fix for that particular regression. Are you sure you're still seeing that behavior in 1.9.1?

<https://github.com/pulumi/pulumi/blob/master/CHANGELOG.md#191-2020-01-27>

The issue in <https://github.com/pulumi/pulumi/pull/3798> should be addressed in 1.9.1 - so it may be you can roll forward to new versions?  Note that that issue is also in the Python SDK, not in the `pulumi` CLI, so the version you pick up from `requirements.txt` is what will impact things.

If you *do* want to downgrade, you should be able to fix the version in `requirements.txt` and install Python dependencies.

What you say is consistent with what I observed on my own machine but one of my remote team members is still seeing the issue. Although I wouldn't speak for anyone else I have been led astray at times by separate versioning of `pulumi` the cli, `pulumi` the python package, and `pulumi-aws` the python package (not a criticism, I can see why the releases are managed this way). Maybe my team member is experiencing the same confusion. Thanks for the quick response.