I’m facing the issue described in this thread too. Was searching for the issue and stumbled onto this. I often get responses from older deployments/versions of my netlify functions. Is this been fixed yet?
I have checked the ARN (of AWS lambda function) for a recently deployed netlify function and seen two different ARNs when requesting from different devices or from the same device at different times. I guess one ARN is the latest version and the other one is the previous version.
And I have faced this type of issues several times in the past a few months. It seems that these issues can be solved by themselves after several minutes or hours.