Hi All - apologies for the vague title.
I'm experiencing a very strange workflow issue: every time I create a new tool, I have to run the entire workflow in order to make edits to that tool. For a very large workflow with thousands of tools that takes multiple minutes to run, this is extremely frustrating and makes simple edits very cumbersome.
When I simply open the workflow in designer, tools appear like this:
Select Tool (Field Names hidden for privacy):

The same thing happens for things like Joins, etc. Once I actually run the workflow, there are no errors and these tools appear as you'd normally expect.
However, once I want to make edits to the workflow, more problems arise. For example, when I add in a Unique Tool, I'm presented with a blank interface:

It's only after I run the workflow once again that I'm able to select from columns here.
Has anyone ever run into this issue, and pinpointed a cause or been able to successfully troubleshoot?