Re: Child flow with Manual Trigger: text property exists but error states thast it does not exist. Bug?
Thanks very much @fchopo. I actually re-built the child flow from scratch to make it work so cannot (at this time) test your answer. But it seems so obvious to me now you say it.
But...
How do you explain this, being the source of the variable syntax when I write an expression:

Hover on the first instance of 'from' which I placed in the flow using Add dynamic content this morning is reads: triggerBody()['text_5'] ** without the '?'**

Hover on the second instance of 'from' which I placed in the flow using Add dynamic content a moment ago is reads: triggerBody()?['text_5'] ** with the '?'**
I can only replicate dynamic content with '?' but it's plain to see that it's turned up in two different ways previously.
Mystery? Bug?
Thanks for your input!