This bug report includes 2 issues that I think are related:

Run workflow UI doesn't provide input parameters¶

When clicking on "Run process" on a workflow that requires inputs from the user, the "Select inputs" UI doesn't show them.

Re-run process doesn't copy the default input values¶

On file src/store/processes/processes-actions.ts, the function getInputs (called from function reRunProcess) assumes that the main workflow object doesn't have any default member, so it copies whatever cwl.input.json has, even if it is empty.

Not sure what should be the precedence if both default values exist.