Why are environment variables being removed upon DO functions update?

I have 2 namespaces - one for production and one for development. In each namespace, I maintain 3 functions. For the production namespace, I have configured the variable NODE_ENV to production. Similarly for the development namespace, I have set the NODE_ENV env variable to development. I have done so for each function. I am doing this so that I can have my code reference production and development config setting files by looking up “.env.<NODE_ENV>” files, which have been packaged with the code.

Here’s what I have observed. With every update of the function, I see that all the env variables configured, via the DO functions web interface, get deleted.

Is this normal behaviour and if so how can I fix this?

Here’s a video of the errors I am seeing - https://drive.google.com/file/d/18denEcbNG7vCECae9m-JBmzQ8kRRRp3K/view?usp=sharing