Credential fields in nested sub-flows lose their value

[rcarmo]

What are the steps to reproduce?

• Create Sub-flow A, and add an environment variable with a "credential" input type.
• Create Sub-flow B, and add an instance of Sub-flow A
• Fill in the credential

What happens?

• The credential input field for the instance of Sub-flow A inside sub-flow B goes blank (no 3-asterisk overlay)
• The value disappears (env doesn't retrieve it)

What do you expect to happen?

Two things:

• That the value did not vanish (both from an UI and code perspective)
• That it was clearer how to add a credential-type input to sub-flows (right now you can click on the left-hand side of the input type and pick out credential, or you can pick just "input" and then click on the right-hand side of the input type and uncheck everything but credential - having both is extremely confusing).

This second point is best illustrated like so:

Please tell us about your environment:

• Node-RED version: 1.2.9
• Node.js version: 14.x (nodesource LTS)
• npm version: what ships with the above
• Platform/OS: Linux
• Browser: Firefox, Safari, Edge (Mac)

[rcarmo]

Forgot to add that this all works fine with a plain string input.

[rcarmo]

Thanks!