How to disable auto refresh of jwt tokens in postman

Hi there.
I’m trying to test the expiration of tokens.
Postman (v8.0.7 macOS Big Sur v.11.2.1) settings to test token expire should be turn off by setting environment variable “enable_auto_refresh_access_token” = false. It should, but it doesn’t work for me. I’m getting auto-refresh the tokens after previous ones have expired.

Any ideas, experience?