Dynamic Content Code Changes When Editing

[ShawnKeeneTF]

I have a flow where some early steps perform string operations:

1. Find Space (outputs the numerical position of the first "space" found in a user's Display Name)
2. Substring (uses the position from the prior step and outputs the substring containing just the user's first name)

I later use the substring output in an email message. It shows as

outputs('FirstName_Substring')?['body']

and it works fine when I save and test my flow. It will continue working fine for all flow runs until I ever click "Edit" on this flow again. As soon as it opens for editing, the email message shows this field as:

body('FirstName_Substring')?['body']

"Body" instead of "Output".  If I save it after it's transformed itself, the flow will fail until I delete it from the email and insert it again using the Dynamic content list to choose the "Substring" step.

In short: it works when first inserted and saved, but if you edit the Flow later it changes (even if you don't open/look at that code, just opening the flow for editing causes it to change).

[a_hansen]

Perhaps you could try using Compose on that substring, then inserting that output into your email?

[ShawnKeeneTF]

Can you guide me a little more on that usage?  I thought I could give it a go but I must be doing it wrong.

I added a compose step immediately after my substring step, using the output of the substring as the input for Compose.

But when I go to the later step to edit the email body, "compose" isn't in the list of available fields to add into the email text.

Here's a screen snip so far:

[ShawnKeeneTF]

Any other ideas?