Why doesn't the new UX for model builder select Line Items when you click on them from in the Formula editor?
Gotcha, there is a bug in that currently you can't click on a list member from the formula editor. This is being worked on and should be released soon. Here are a couple of other threads on the same topic.
You sure you are in edit mode for the formula? I ask because clicking on a line item works for me.
Yep, these are the steps I followed:
1. Open my module: DATA01 CD Accounts
2. Edit the Test line item
3. Opened my list: CD1 Account List
4. Clicked on the Account 1 List item, and nothing is added to the formula editor below.
No problem, sorry for the inconvenience but we are aware of it and it will hopefully be fixed soon.